This is a A-71820C91 Cylinder End PN: 71820C91Main Description As Following : A-71820C91 Cylinder End P.N: 71820C91 Dim A (1): A - 2.750"Dim B (2): B - 1.315"Dim C (3): .875" I.D. - 14 Thread Replaces: A-71820C1 IH , Crossed From: AM71820C91 , , HC71820C91 , , WN-71820C91 , , WN71820C91 , Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : Dim A (1): A - 2.750" Dim B (2): B - 1.315" Dim C (3): .875" I.D. - 14 Thread