This is a A-AP24395 Pulley, Idler (4-1/2") PN: AP24395Main Description As Following : A-AP24395 Pulley, Idler (4-1/2") P.N: AP24395 Dim A (1): Flat PulleyDim B (2): 1" WidthDim C (3): 1/2" BoreDim D (4): 4-1/2" O.D. Stocked As: A-P6365 Found in Section & Models : Separator Area > Separator Sprockets and Sheaves, John Deere COMBINE: 6602, John Deere COMBINE: 6622 Associated Items : New Also This is An Aftermarket Product And : Dim A (1): Flat Pulley Dim B (2): 1" Width Dim C (3): 1/2" Bore Dim D (4): 4-1/2" O.D.