Garage Door Opener LM Drive Worm Gear Kit Comp With Liftmaster Part 81B0045

Garage Door Opener LM Drive Worm Gear Kit Compatible With Sears Part 41A2817 Drive Worm Gear Kit for Sears Craftsman Liftmaster Chamberlain Garage Door Openers 1984-Current This listing includes: 1 Complete Drive Worm Gear Kit 1 Set of Instructions PRODUCT SPECIFICATIONS: Drive Gear Bore Size (Inner Diameter): 1/2" or .5" Drive Gear Outside Diameter: 2 3/4" or 2.75" Drive Gear Number of Teeth: 32