This is a A-8N10130A Pulley, Generator (Single) PN: 8N10130AMain Description As Following : A-8N10130A Pulley, Generator (Single) P.N: 8N10130A Dim A (1): A - .950"Dim B (2): B - 3.735"Dim C (3): C - .602" Stocked As: A-GFD5000 Found in Section & Models : Ignition & Electrical Parts > Alternators & Related Parts, Ford / New Holland TRACTOR: 2N, Ford / New Holland TRACTOR: 8N (1950-1952) Associated Items : New Also This is An Aftermarket Product And : Dim A (1): A - 1.173" Dim B (2): B - 3.740" Dim C (3): C - .669" Dim D (4): D - 4mm Keyway Dim E (5): For 16mm belts