Description
LiftMaster Output Shaft and Sprocket Kit LIF K77 36539 S800H CBAC Secondary Kit 180° Grade 2 standards UL cUL: All FAA 63000131 liftmaster bearing Model:Uninstalled 3 7 16 diameter Grade 2 standards UL cUL: All locks listed for A label single fire door 4' x 8' and pair doors UL 437: Optional UL listed high security cylinders Other: ADA compliant levers (all designs) or a POTS (Plain Old Telephone Service) connection