This is a A-1306358C1 Hub PN: 1306358C1Main Description As Following : A-1306358C1 Hub P.N: 1306358C1 Dim A (1): 4.570" O.D.Dim B (2): 3.625" O.D. Bolt Hole CentersDim C (3): 1.134" Hex Hub Crossed From: AV100674 VAPORMATIC Found in Section & Models : Headers/Platforms/Feeder House > Corn Head Parts, Case-IH HEAD, CORN: 1054, Case-IH HEAD, CORN: 1063, Case-IH HEAD, CORN: 900 SERIES Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 3.625" O.D. Bolt Hole Centers Bore: 1.134" Bore Type: Hex Outside Diameter: 4.570"