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MOD117

Manaras Special Application Chip Modification

69988.3072

Todco Original Bottom Seal Retainer Reefer Cut to Size ** Special Order Item Price by Quote Only

  • Fits Serial #30662431-1
41C2762

LiftMaster Chain Assembly Kit 7' (041D3484)

  • Also known as: 41D3484 41A3484 41C2762
  • For use with various chain drive garage door openers that utilize a T-rail and have a 7' garage door
39902R

Genie Wireless Wall Console GWWC-P

  • Completely Wireless Installation – No need to have an additional wired wall console -absolutely no wiring required for operation!
  • Works with all Genie Intellicode® openers since 2013. (Not compatible with Models 1022 1024 1042 2022 2024 2027 2042.)
  • Large buttons and attractive blue LED light makes the console easy to see in the dark.
  • The pulsating light has two optional speeds or can be turned off for maximum battery life.
  • Backlighting will turn red to notify the user of low battery.
  • Turn only the garage door opener light itself on at any time for steady light in the garage.
    • .......more details
210-0040

TNR Doors CurtainLok Assembly Kit Grey 5/ Kit (10 pcs) ** Price by Quote Only

  • 5 complete curtain locks with fasteners per kit
MD-00142

Sprocket 410B17 3/8" Bore NO KW 2SS

200722

Torque Force Extension Bracket for Spring Failure Device Short

  • Zinc Plated Steel bracket
  • Use with 1" or 1-1/4" SFSD device
  • Includes M10 nuts and bolts
  • Dimensions: L=2.9" OFFSET = 4:3/8" and 5"
MD00008

Micanan Limit Chain with Link

CLUTCH007

Manaras Friction Clutch 1-1/4" #50 OGH

MD-00146

Sprocket 410B18 3/8" Bore NO KW 2SS

21-7575-1

LiftMaster Transformer 575V 3 PH

  • For use with various LiftMaster® Logic 5.0 NEMA 4 and 4X Commercial Door Operators
O02R9102

AirLift Collar Aluminum w/Set Screws

O22R1104

AirLift Fitting Straight 3/8 x 1/8 NPT

O02R9000

AirLift Turnbuckle Complete

41014

Doorlec Emergency Release Spring

  • Attaches to the wall disconnect leverto put the operator in manual mode in case of power failure
GAREX-PAINT-BRN

Garex Touch-Up Paint Commercial Brown

202-0022

TNR Composite Bottom Bar Arm for HDXL *** Price by Quote Only

RG-K-P

Miller Edge Reflecti-Guard Pulsed Photo Eye Monitored 30ft Range

  • Monitored retro-reflective technology
  • Includes: (1) wired emitter/receiver with integrated mounting bracket (1) reflector (1) reflector bracket
  • 30 ft. range
  • Pulsed and relay models
  • Enhanced sunlight immunity
  • Impact resistant for rugged environments
    • .......more details
5415-2

EMX RAVEN Dual Relay Microwave Motion Sensor

  • Distinguish between vehicles and pedestrians
  • Two configurable relay outputs
  • Adjustable sensitivity and cross traffic suppression
  • 8-23 ft (2.5-7 m) mounting height
  • Optional remote control for easy programming
5416-2

EMX RAVEN Programming Remote

  • Makes it easy to set up and make adjustments to all key parameters of the RAVEN motion detector while at ground level
  • Remote sold separately
Quick Start Guide
GAREX-PAINT-BLK

Garex Touch-Up Paint Black

  • 0.5 OZ
GAREX-PAINT-WHTE

Garex Touch-Up Paint White

K1D8059-1CC

LiftMaster Main Control Board with Heat Sink

  • This is a Pre-UL2016 Seven Segment Main Control Board with Heat Sink.
  • Compatible with LiftMaster® Models CSL24VDC CSW24VDC RSL12VDC and RSW12VDC Pad Mount Gate Operators.
  • Complete replacement kit includes: logic board adapter harness and installation hardware.
K-SL5851011G3

LiftMaster Electrical Box Replacement Kit SL585 115V 1HP 1PH *** Price by Quote Only

  • Compatible with LiftMaster® SL585 Series 1-Phase 1HP Slide Gate Operators.
02-515

LiftMaster Panic Release Device

10-8026

LiftMaster Replacement Plate for Control Panel BG790

  • Also known as: K10-8026 G108026 108026
LA412DC

LiftMaster replacement 12VDC Solar Actuator Arm

  • he LA412 Arm runs on 12V and connot be subbed for LA400 Arm
HCT12

LiftMaster HCT Rail Only 12'

  • Yellow zinc dichromate premium rail finish offers maximum rust protection in open-air environments.
  • Heavy-duty 12-gauge C channel corrosion resistant steel track.
  • This DOES NOT include the head unit
  • Will open a standard sectional door 11'6" high
104-0011

TNR Chain Tensioner CT3201 ELS16-B1

  • Ansi #80
510.2755.00

Whiting Welded Brackets

  • This is an upcharge when ordering certain doors
102-0048

TNR Flexam EM 4/1 0+05 Black Weave Repair Sold per Inch

102-0001

TNR Cement Rubber CC-EBLK-002 Black 40/Box

  • Shaw Almex
PRO-GH-30053U-RH

Micanan 3 HP 575V 3P Gearhead Operator N1 Eyes Monitored ECB Right Hand

  • External radio control terminal strip
  • Heavy duty worm gear reduction in oil bath gearbox
  • Solenoid brake standard
  • #50 roller chain and sprockets on final drive
  • Emergency chain hoist with electrical cut-out switch for manual operation
  • Universal Right or Left Hand mount
    • .......more details
K75-36875-3

LiftMaster Gear Housing Kit GH 3PH L5

  • Compatible with Three Phase LiftMaster® GH Model Logic 5.0 Commercial Door Operators.
  • Complete kit includes: Housing Support Bracket Pads and Pressure Plate Housing with Cover Disconnect Kit Hand Chain Shaft Brake Kit and Installation Hardware.
DC500-100

Dyna-Hoist DC Series Direct Drive Opener 1/2 HP 110/240V 1ph ** Price by Quote Only

  • The direct drive operator consists of a DC electric motor directly coupled to a hollow shaft (30:1 reduction) worm gear reducer designed to install over keyed door shaft.
  • Continuous duty 0.5 HP 90 V DC 1750 rpm motor suitable for 110 to 240 V 1 PH and 60 Hz power supply.
  • Comes with integral absolute encoder to control the door travel
  • 24 V 5 amps back-up battery pack and 3/8” ratchet socket to accept and crank for manually operating the door in case of power failure
  • Programmable wall mountable UL325 compliant NEMA 4X control panel with LCD display and OPEN-CLOSE-STOP buttons on cover
  • Nema 4 photocell
    • .......more details
Pulse Series Installation ManualsDC Series Brochure
210-0057

TNR Doors CurtainLok Kit HDXL9 5/Kit (10 pcs) ** Price by Quote Only

  • Natural UHMW-PE 5 Lok's
  • Sold as a kit of (5) complete loks that require 2 curtain loks and 2 screw (10) of each piece for 5 loks
SMT7000TP5

Telco Thru Beam Transmitter DC M18 5M Cable

  • Supply Voltage: 10 - 30 V dc
  • Light Source: Infrared (880 nm)
  • Control Feature: Test Input
  • Sensing Range: 20 m
  • Housing: M18 x 1 Plastic
  • Connection: 5m cable
    • .......more details
O04R2009

AirLift Bracket Horizontal 20" Flat Bar

K76-34728

LiftMaster EMI Board with Power Switch

  • Compatible with various LiftMaster® Perimeter Access Systems
K52C0481

LiftMaster Bridge Rectifier

  • Bridge Rectifier Converts AC to DC voltage
  • For powering DC accessories when AC transformer present
  • Small size with convenient mounting hole in center
26-40050

Truck Door Offset U-Channel Seal Retainer 98" Long for Whiting DryFreight Doors

  • Aluminum extrusion construction.
  • Retainer is offset to allow header clearence with seal when door is in open position.
  • For use with offset bottom seal #26-40045
  • Cross Reference: W #8280
2376.187*31.930

Whiting Torsion assembly .187 wire size 31" spring length 93" shaft

  • This is a full balancer assembly
  • Twin springs one road one curb with a shaft through it
LRS-LC

EMX Logic Controller

  • For use with the Loop Replacement System (LRS-C1) Magnetoresistive Vehicle Detector Control Unit
  • Connects two stand-alone sensors to expand the detection area
  • Works with LRS-DB (LRS-DB-50 or LRS-DB-100) Direct Burial or LRS-FP Flat Pack (LRS-FP-50 or LRS-FP-100)
  • Logic Interface allows one (1) or two (2) sensors to be connected to one (1) output
  • Provides six (6) selectable logic functions and two (2) separate relay outputs
  • A/B directional logic can be selected with an output for each direction of travel as a vehicle passes over two sensors
    • .......more details
7-6135

Richard-Wilcox 1x#31 Rail Support

  • Used with #461-0004 track
K75-16512

LiftMaster FDC Brake Kit

  • For use with various LiftMaster® FDC Commercial Fire Door Operators
19-40100-SS

Roller Chain #40 Stainless Steel 100ft Pack

  • 100ft length Stainless Steel
OSH-6213-CONT-RH

Manaras Opera-SH 3/4 HP 240V 1Ph Contactor Right Hand

  • An ultra high-end heavy-duty V-belt drive industrial jackshaft operator
  • For use on Standard High and Vertical Lift sectional doors
  • Can also be used on Rolling doors and Grilles
  • Comes with a chain hoist for manual operation and a floor level engaging device
  • Clearence: side room required 16"
  • 25 cycles per day > 100 cycles per day
    • .......more details
Installation Manual
RGH-6114-MON-LH

Manaras 1 HP 120V 1Ph Rapido Gear Head Op. Monitored ECB Left Hand

  • Rapido version of model OGH
  • Includes PHOTO-061 Monitored N4X Thru-Beam eyes
CAMPLATE012

Manaras Cam Plate MTH/MTBH N1

CDJH-423-ECB-RH

Lynx CDJH Heavy-Duty Jackshaft 3/4 HP 208/220V 3 PH with ECB Right Hand UL325

  • 3 Button station (NEMA 1)
  • 1650 RPM high starting torque motor with overload protection
  • Inherent Mechanical Brake (I.M.B)
  • B2 Mode C2 Mode D1 Mode E2 Mode T Mode TS Mode
  • On board Open Close & Stop for ease of setting limits
  • Pre-wired to accept sensing devices
    • .......more details
19-41ML-SS

Master Link #41 Stainless Steel

  • For #41 chain
19-41HL-SS

Half (Offset) Link #41 Stainless Steel

  • For #41 chain
51115

Doorlec Fire Release System

  • For fire rated rolling service doors connecting to existing dropout fusible link device
  • For GH and Belt Drive operators
EHJ-RSF

Belt Drive Rolling Steel Hood Mounting Plate

  • 1/4’’ steel plate painted with a black oxide finish
GH-RSF

Gear Head Rolling Steel Hood Mounting Plate

  • 1/4’’ steel plate painted with a black oxide finish
LRS-DB-100

EMX Direct Burial Sensor with 100 ft Lead Wire

  • Lead probe ONLY. Requires the LRS-C1 detector
  • Three-dimensional presence detection of vehicles
  • Select X Y Z axis independently
  • Stand-alone sensor
  • Sensor stores ambient background and settings in non-volatile memory
  • Includes direct burial sensor and 100 ft of lead wire
    • .......more details
DEV-RSSD-3000

Devanco Rolling Steel Service Door 3000 20GA Non Insulated Galvanized Slats **Made to Order

  • Model 3000 roll up door is complete with a curtain hood guides counterbalance and option for operation such as chain hoist manual lift electric operator.
  • Pricing varies according to size and options selected.
MK01563

Explosion Proof Killark Labeled ON/OFF Key Switch

EHJX-311-1/2

Doorlec Industrial Jackshaft Op. Explosion Proof 1/2 HP 120V-1Ph

  • Explosion proof NEMA 7/9 Heavy-Duty Industrial Operator
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse.
  • Solenoid Brake prevents coasting and secures the door when closed
  • Explosion-proof (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
C-1520-134-W

Thermal Window 19-1/2" x 14-5/16" Cut-Out for 1-3/4" Cedo Door White

  • For 1-3/4" thick door
  • Model: 1520
  • Frame Size: 20 9/16” x 15 7/16” Cut-Out Size: 19 1/2” x 14 5/16”
  • Cedo replacement frame
EHJX-383-3/4

Doorlec Industrial Jackshaft Op. Explosion Proof 3/4 HP 208V-3Ph

  • Explosion proof NEMA 7/9 Heavy-Duty Industrial Operator
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse.
  • Solenoid Brake prevents coasting and secures the door when closed
  • Explosion-proof (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
BOARD105AGF

Goff Replacement Control Board Non Monitored for Manaras Op

  • Same as 32042
  • Not available from Manaras
3228.6

Whiting 2" Nylon Roller 3" Shaft Sealed Both Sides Upgrade Option w/Door Package

  • This is a Whiting original roller upgrade package on a complete door
CDOPCK

LiftMaster 850LM with 5 x 813LM Remotes

GHW-383-3-230V

Doorlec Industrial Gear Head Door Operator 3 HP 230V 3P with ECB and Nema4 modification

  • Extra heavy-duty industrial-type electric door operator for damp environments.
  • Worm gear reducer 40:1 ratio
  • #50 roller chain and sprockets from operator shaft to door shaft. (#60 chain optional)
  • Door speed: 7 inches per second (approx.)
  • Adjustable torque limiter (also called friction clutch)
  • Rotary type limit switches
    • .......more details
MG020-Y-2E-P/FT

Miller Edge Sensing Edge Yellow 2-Wire End Outlet Sold per Foot

  • Electromechanical slide in edge with a small profile for motorized gates and doors rolling shutters and pinch point protection applications.
  • Touch sensitive signaling
  • Temperature range: -30F to 155F
  • Lead wire: 18 gauge 2ft length
  • Sensitivity: nominal 4 PSI
  • 2 wire NO configuration
    • .......more details
C-34X16-134-W-G/T

Thermal Window 34" x 16" for 1-3/4" Door White Frame Grey Tint Glass

  • For 1-3/4" thick door
1634-134-W

Elton Commercial Window for Flush Doors 1-3/4" thick 16x34 White Frame Sealed Glass

  • Screw together window kit
  • Thermal window
  • Frame size: 35-1/8" x 17-1/8"
  • Cut-out size: 33-7/8" x 15-7/8"
  • Vision area: 31-3/4" x 13-11/16"
  • Different glass options and frame colours are available upon request
    • .......more details
15-50B40QGH

Sprocket Kit 50B40 1.25" Bore x 1/4" Key w/ SS

EHJ-353-1

Doorlec Industrial Jackshaft Op. 1 HP 575V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
EHJ-353-1/2

Doorlec Industrial Jackshaft Op. 1/2 HP 575V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
EHJ-343-1

Doorlec Industrial Jackshaft Op. 1 HP 460V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
EHJ-343-1/2

Doorlec Industrial Jackshaft Op. 1/2 HP 460V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
EHJ-383-1

Doorlec Industrial Jackshaft Op. 1 HP 208V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
    • .......more details
GH-383-1

Doorlec Industrial Gearhead Door Operator 1 HP 208V 3-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
    • .......more details
GH-311-1.5

Doorlec Industrial Gearhead Door Operator 1.5 HP 115V 1-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
    • .......more details
GH-321-3/4

Doorlec Industrial Gearhead Door Operator 3/4 HP 230V 1-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
    • .......more details
B/CDJH-12-115-ECB

Lynx CDJH HD Jackshaft with Solenoid Brake 1/2 HP 115V with ECB UL325

  • New LX100 circuit board.
  • Built-in 3-channel 372 Mhz radio receiver accepts up to 20 remotes
  • 4L V-belt primary reduction #41 drive chain and sprockets.
  • Adjustable friction clutch Inherent Mechanical Brake included
  • Solenoid brake optional **
  • Fully driven adjustable limit switches.
    • .......more details
MOD114C

Manaras Synthetic Oil Upgrade for MGH up to 1.5HP

  • This Upgrade Mod. is only available when purchaed with a compatible operator
  • Synthetic oil is placed in the operator's reducer for improved performance stability and decreased sensitivity to temperature variances
MGH-6534-ECB-RH

Manaras 1 HP 600V 3P Jackshaft ECB Right Hand

  • A very heavy-duty worm gear industrial operator designed for use on Industrial standard high and vertical lift sectional or rolling doors and grilles.
  • It incorporates a chain hoist for manual operation with a floor level engaging device with electrical cut-out
  • Electrically activated drum-band type solenoid brake
  • Full overload protection
K20-1075C-2LP-H27

LiftMaster Electric Motor 3/4 HP 115V 1Ph Logic 5

  • Also known as: K20-1075C-2LP-H24
  • Replacement electric motor (3/4 HP 115/230V 1PH L5). For use with various LiftMaster® Logic 5.0 Gear-Reduced Commercial Door Operators
MM00050

Micanan 1-1/2" Collar Bracket #8 FDG MSI0054

BRKIT001

Manaras Brake Resistor for 120V Rapido

  • Added option to RSH or RVH operators
Wiring instructions
GH-321-1.5

Doorlec Industrial Gearhead Door Operator 1.5 HP 230V 1-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
    • .......more details
HCT14

LiftMaster HCT Rail Only 14'

  • Yellow zinc dichromate premium rail finish offers maximum rust protection in open-air environments.
  • Heavy-duty 12-gauge C channel corrosion resistant steel track.
  • This DOES NOT include the head unit
  • Will open a standard sectional door 13'6" high
K11-37823

LiftMaster Idler Shaft (1) SL595U

  • Fits SL595U
K19-4853

LiftMaster Chain #48 x 53 No Master Links

  • Fits the SL595UL gate operators
GT-100A

Skylink Garage One Receiver Rolling Code ***To Extent of Inventory

  • Automatic door closer: Never forget to close your garage door again.
  • Built-in timer from 2 minutes to 20 minutes will close the door automatically.
  • Audio warning when door is about to close.
  • Kit includes: Monitor Sensor model: GS-101 and Reciever GC-433R
  • Advanced Rolling Code Technology
  • Replaces your traditional wall button with Wall Console
    • .......more details
O02R9502

AirLift Rebuild Kit Orig. Op. w/Brass Nut

O02R9208

AirLift Top Cap Brass Nut w/Rod Seals

15220

Doorlec Fuse 1 AMP Slow Blow Sold Individually

SHAFT072

Manaras Input Shaft for MLH 5/8"-18

K12-8032

LiftMaster Flange Bearing 4-Bolt 1-1/2"

  • Also known as: 128032 12-8032 G128032
  • For use with LiftMaster® Models BG770 and BG790 Barrier Gate Operators.
KCIEN-SBP

DigiCode Illuminated Keypad with Controller Built-in

  • Illuminated stainless steel keypad
  • 100 user codes (4 to 6 digits)
  • 2 form C outputs (6A/250V) timed (1 to 99 sec.) or latched
  • Audible feedback buttons
  • Request-to-exit input
  • Potted electronics
    • .......more details
STRUT-2-1/4-14'

Door Strut 2-1/4" Hemmed 14 ft Long

  • Reinforcement bar 2-1/4"
  • Galvanized
3007-1

Elton Telescopic Door Handle / Foot Plate Black

  • For door thickness: 1-3/8" - 2"
  • Black polyethlene
  • Cut-out size: 6-3/8" x 3-5/8"
684-33-102

Universal Bracket 2.25" x 2.5" x 144" w/ Plate 12"x12"

BCH501L5-RH

LiftMaster Hoist Op. with Carwash Mod.and Brake 1/2 HP 115/230 VAC Logic 5 Right Hand ***Replaced by CRBH501-RH

  • Industrial Duty Hoist Operator with Damp Environment modification.
  • Comes with CPS-UN4 photoeyes and brake
SSZP15-6

Solid Shaft 1" Keyed Zinc Plated 15'-6"

RR-3-11-6202

Roller 3" UHMW + Rubber 11" Stem Black

  • 3" UHMW tire covered with rubber
  • 6202 sealed precision bearing
  • 11" zinc plated stem
  • Rating: 200lb load; 100000 cycles of a 12' door
  • Helps quiet the operation of jackshaft operators