LiftMaster's 20B21-1 Drive Belt for various LiftMaster Screw Drive Garage Door Operators. The Drive Belt connects directly to the operator motor to drive movement of the door. The 20B21-1 is compatible with models 3130, 3240, and more screw drive openers manufactured by LiftMaster. Check the owner's manual or replacement parts diagram for specific part information before ordering to ensure compatibility.
LiftMaster 20B21-1 Drive Belt
For LiftMaster Screw Drive Operators
Compatible operators include models: 3130 and 3240