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LiftMaster's 81C275 Screw Drive Rack Replacement Kit installs on the garage rail with the carriage trolley. The 81C275 is designed for LiftMaster and Chamberlain Screw Drive Garage Door Opener Models: 3130 or 3240. Check the owner's manual or replacement parts diagram for specific part information before ordering to ensure compatibility.
LiftMaster Screw Drive Rack Replacement Kit
Also known as: 081C0275, 81C275
Compatible with models: 3130 or 3240