Cool Coil Technology, Heavy Duty "FatBoy Series" Upgrade Replaceable Pulley Bearing, Super Smooth "Xtreme Precision" Machined Pulley Upgraded to 3 Layer "Xtreme TOUGH" Integrated, Water Tight, Impact resistant Wire Harness Specs: Description: PTO Clutch, 1.000" Crankshaft, 6.31" Pulley, Clockwise, A/B Belt, 200 ft. lbs. torque Replacement For: Exmark: 1-631644, 1-631731, 1-633098, 103-0500, 103-0661, 103-0662, 631644, 631731, 633098, E631644, E631731, E633098, 33-135, Prime: 7-06269, 7-06282, Rotary: 11133, 255-399, Toro: 1-631644, 1-631731, 1-633098, 1-641213, 103-0500, 103-0660, 103-0661, 103-0662, 631644, 631731, 633098, E631644, E631731, E633098, Warner: 5218-21, 5218-25, 5218-293, 5218-76, 5218-76C **Verify the part fits before purchasing**Specs:Description: PTO Clutch1.000" Crankshaft6.31" PulleyClockwiseA/B Belt200 ft. lbs. torqueReplacement For: Exmark: 1-631644, 1-631731, 1-633098, 103-0500, 103-0661, 103-0662, 631644, 631731, 633098, E631644, E631731, E63309833-135Prime: 7-06269, 7-06282Rotary: 11133255-399Toro: 1-631644, 1-631731, 1-633098, 1-641213, 103-0500, 103-0660, 103-0661, 103-0662, 631644, 631731, 633098, E631644, E631731, E633098Warner: 5218-21, 5218-25, 5218-293, 5218-76, 5218-76CCompatible With/Replacement For: Exmark: Lazer Z : 18 to 23 hp Kohler Units, Serial No. 000,001 - 789,999, Lazer Z : 27hp and 30hp Kohler Units, Serial No. 370,000 and up, Turf Tracer Hydro sn 320,000 & Up, Turf Tracer S Series sn 920,000 & Up, Turf Tracer X Series sn 920,000 & Up