This is a A-B1XT0328 CLUTCH, PTO XTREME X0328 PN: B1XT0328Main Description As Following : A-B1XT0328 CLUTCH, PTO XTREME X0328 P.N: B1XT0328 High Torque Cool Coil UpgradeHigh Temperature Bearing UpgradeReplaceable Pulley BearingSuper Smooth "Xtreme Precision" Machined PulleyUpgraded to 3 Layer "Xtreme TOUGH" Integrated, Water Tight, Impact resistant Wire HarnessCrankshaft: 1Pulley: 4.875 DRotation: CWBelt: 2/ASeries: Xtreme Torque Crossed From: X0328 XTREME , 388764 GRASSHOPPER , 388764 WOOD BROTHERS , 388764 WOODS , 388765 GRASSHOPPER , 388765 WOOD BROTHERS , 388765 WOODS , 5219-10 WARNER , 521910 WARNER , 606239 GRASSHOPPER , 606239 WOOD BROTHERS , 606239 WOODS , 7-06287 PRIME LINE , 706287 PRIME LINE Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Torque Cool Coil Upgrade High Temperature Bearing Upgrade Replaceable Pulley Bearing Super Smooth "Xtreme Precision" Machined Pulley Upgraded to 3 Layer "Xtreme TOUGH" Integrated, Water Tight, Impact resistant Wire Harness Xtreme Torque Series Crankshaft: 1 Pulley: 4.875 D Rotation: CW Belt: 2/A Series: Xtreme Torque