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this 17-foot arm delivers both functionality and safety
Function: Motor drive sprocket for chain transmission
Torque: 400 lbf
Door Compatibility: 1-3/8 in to 2-1/4 in thick doors
LiftMaster K77-37854 Operator Housing Cover for RSW12UL aom-sw300ac this 17-foot arm delivers bothOperator Housing Cover for LiftMaster RSW12U UL Swing Gate Systems The LiftMaster K77 37854 is a genuine replacement operator cover housing box designed to restore the protective enclosure of RSW12U and RSW12UL swing gate operators. Built to match original specifications, this OEM housing safeguards internal components from weather and debris while maintaining UL325 safety compliance. Ideal for replacing damaged or worn enclosures, the K77 37854
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