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K029B0129 is a Belt Connector Replacement Part. For use with various LiftMaster® and Chamberlain® Belt Drive Garage Door Openers. This replacement part is required when it's necessary to shorten an older style belt on units manufactured 1995 to 2007. This belt connector is 1 of 2 pieces required to complete the belt retainer clip. Check the owner's manual or replacement parts diagram for specific part information before ordering to ensure compatibility.
Refer to the following part # for the additional piece needed to replace and complete the belt retainer clip: K029B0130