LiftMaster 41A4371 Belt Cover Cap Retainer Garage Door Opener Chamberlain Craftsman Compatible with LiftMaster Chamberlain garage door opener belt drive models 1270, 1280, 1280R, 2280, 2580, 2585, 8100, 8200, WD822K, WD922K, WD912K, WD822KS, WD912KS all models may not be listed NOT compatible with dual sprocket units