This is a A-L78-13 Flange, Hydraulic Pump Drive PN: L78-13Main Description As Following : A-L78-13 Flange, Hydraulic Pump Drive P.N: L78-13 Optional drive flange for morflex series 352 coupler.Dim A (1): 13 Spline For .875" ShaftDim B (2): .313" Dia. Bolt Holes OnDim C (3): 2.250" Centers Crossed From: 1101-0405 , Found in Section & Models : Hydraulic System Parts > Hydraulic Pumps, Ford / New Holland TRACTOR: 352 SERIES (MORFLEX COUPLER) Associated Items : New Also This is An Aftermarket Product And : Optional drive flange for morflex series 352 coupler. Dim A (1): 13 Spline For .875" Shaft Dim B (2): .313" Dia. Bolt Holes On Dim C (3): 2.250" Centers