Compatible with Chamberlain, Craftsman and LiftMaster belt drive models that don't use square rail Replaces part 41B3869-3A, 41B3869, 41B3869-1.
Compatible with Chamberlain, Craftsman and LiftMaster belt drive models that don't use square rail Replaces part 41B3869-3A, 41B3869, 41B3869-1.