Xtreme Outdoor Power Equipment Replaces Grasshopper Model 721 721D 721D2 388769 Clutch-Bearing Upgrade 1.125" ID Xtremely cool coil design runs over 20% cooler for a longer service life  plus every clutch is backed by a buyer-protection 1-year warranty Replaces OEM: 388767, 388769, 606242 Replaces Warner: 5218-67, 5218-58, 5218-26, 5218-257, 5218-229, 5218-214, 5218-147, 5218-170, 5218-226 Specs: 1.125" Crankshaft, 4.875" Double Pulley, Clockwise, Double 1/2" Belts, 205 ft. lbs torque Free Upgraded - High Temperature Bearings. TOUGH Machined Billet Pulley with Replaceable Bearing - OEM Upgrade