LiftMaster Sprocket, 50B18T, 1-1/2"B x 3/8" | LIF-15-50B18TKK Wireless Intercom Systems this 20-foot Varioboom arm includes

this 20-foot Varioboom arm includes integrated red and green LED strips to clearly signal barrier status—red when closed

compact and efficient communication devices are of utmost importance

Hereby is an overview of the different types of Boosters:

Arm Type: Double Lever Arm Regular

LiftMaster Sprocket, 50B18T, 1-1/2"B x 3/8" | LIF-15-50B18TKK Wireless Intercom Systems this 20-foot Varioboom arm includesLiftMaster Sprocket, 50B18T, 1 1 2"B x 3 8" LIF 15 50B18TKK This is a replacement Sprocket (50B18T, 1 1 2"B x 3 8") for use with various LiftMaster Commercial Door Operators. Genuine LiftMaster replacement part. Also known as: 159104