The LiftMaster 41A5021 is a complete belt drive gear and sprocket replacement kit. This gear and sprocket kit is used with various belt drive garage door openers. This complete gear kit includes these items; helical gear, worm gear, wear bushings, grease and hardware needed to replace the belt drive gears.
Usually Ships In One Business Day!
Note: You must have a belt drive system like the one below for this gear kit to work.