Drive Gear and Grease for Chamberlain, Liftmaster, Sears Openers, Model: 41A2817-Q & L0113-07 Compatible with Chamberlain, LiftMaster, and Sears Craftsman openers manufactured from 1984-current Includes Lubriplate Aero 3/8 oz multipurpose, low temperature lithium grease Apply Lubriplate Aero grease to each gear tooth, making sure to use entire tube Gear diameter: 2 3/4