This is a A-E1657 Plate, PTO Clutch PN: E1657Main Description As Following : A-E1657 Plate, PTO Clutch P.N: E1657 4 used in A-100548ASA PTO Clutch AssemblyDim A (1): 4.994" O.D. Crossed From: 107937 , Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada