This is a A-526666M91-A Pressure Plate: 11", 3 lever, cast iron, combined PTO, w/o release plate, narrow fingers PN: 526666M91-AMain Description As Following : A-526666M91-A Pressure Plate: 11", 3 lever, cast iron, combined PTO, w/o release plate, narrow fingers P.N: 526666M91-A Spline Count: 10Spline Diameter: 1.750" Replaces: 526666-R MASSEY FERGUSON , Crossed From: SW06607 , Found in Section & Models : Clutch Parts > Double Clutch, Massey Ferguson INDUSTRIAL/CONSTRUCTION: 20 (Trans S/N ), Massey Ferguson TRACTOR: 133, Massey Ferguson TRACTOR: 135 (w/ Captive 10 Spline PTO Disc), Massey Ferguson TRACTOR: 140, Massey Ferguson TRACTOR: 145, Massey Ferguson TRACTOR: 150, Massey Ferguson TRACTOR: 35, Massey Ferguson TRACTOR: 50 Associated Items : New Also A-MH-O-MF20IND, A-MH-P-MF20, A-MH-S-MF20TLB, A-MH-O-MF202, A-MH-O-MF202204, A-MH-O-MF2024FL, A-MH-P-MF20234, A-MH-S-MF100LDR, A-MH-S-MF202204, A-SMMF14, A-MH-O-MF203205, A-MH-P-MF20234, A-MH-S-MF100LDR, A-MH-S-MF203205, A-MH-O-HYDRSYST, A-MH-O-MF2135, A-MH-P-MF2135, A-MH-P-MF32LDR, A-MH-S-MF100LDR, A-MH-S-MF2135I And : Spline Count: 10 Spline Diameter: 1.750"