This is a A-AH114830 Sprocket, Row Unit, RH, 23 Tooth / 80 Chain PN: AH114830Main Description As Following : A-AH114830 Sprocket, Row Unit; RH, 23 Tooth / 80 Chain P.N: AH114830 Dim A (1): 23 ToothDim B (2): 7.857" O.D.Dim C (3): 1.130" Hex Hub Crossed From: AV103280 VAPORMATIC Found in Section & Models : Headers/Platforms/Feeder House > Corn Head Parts, John Deere HEAD, CORN: 1092 (SN <710100), John Deere HEAD, CORN: 1243, John Deere HEAD, CORN: 1290 (SN <710100), John Deere HEAD, CORN: 1291 (SN <710100), John Deere HEAD, CORN: 1293 (SN <710100) Associated Items : New Also This is An Aftermarket Product And : Hub: 1.130" Hex Outside Diameter: 7.857" Teeth: 23