This is a A-3M740-91040 Ball, Replacement (Cat II) PN: 3M740-91040Main Description As Following : A-3M740-91040 Ball, Replacement (Cat II) P.N: 3M740-91040 Replaces: 33400-91040 Stocked As: A-RB002 Found in Section & Models : Hitch & Drawbar Parts > Hitches: 2PT and 3PT, Kubota TRACTOR: M4950, Kubota TRACTOR: M4950-S, Kubota TRACTOR: M5950, Kubota TRACTOR: M5950-S, Kubota TRACTOR: M7500 Associated Items : New Also A-KU-O-LDRM1840A, A-KU-O-M4950, A-KU-O-CABM5950, A-KU-O-LDRM1840A, A-KU-O-M4950, A-KU-O-M5500 And : Replaces: 33400-91040