This is a A-560-8406 Friction Clutch, BP4 / W2300 Series PN: 560-8406Main Description As Following : A-560-8406 Friction Clutch, BP4 / W2300 Series PN: 560-8406 Found in Section & Models : Driveline > Clutch, Bondioli & Pavesi TORQMASTER: 4 SERIES, Walterscheid TORQMASTER: 2300 SERIES Associated Items : New Also This is An Aftermarket Product And : Weasler alternative to original part. Dim A (1): 1 3/8" X 6 Spline w/ Double Clamp Dim B (2): 7,965 Lb./In. Bore: 1 3/8" - 6 Spline