LiftMaster 4178B0034B Straight Door Arm Liftmaster G305 803002 16 Controller via the RS-485

16 Controller via the RS-485 peripheral bus

On/off switch

HySecurity Harness LED Light/Kill Switch | HYS-MX4122

SK–24VDC power supply

LiftMaster 4178B0034B Straight Door Arm Liftmaster G305 803002 16 Controller via the RS-485LiftMaster 4178B0034B Straight Door Arm This is a Straight Door Arm Replacement Kit. For use with various LiftMaster and Chamberlain Garage Door Openers. The straight arm is commonly paired with the curved door arm. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. Refer to the following part # for the Curved Door Arm Replacement Kit: 041B0035B Genuine LiftMaster replacement part. Also