This is a A-H233287 Sprocket, Gathering Chain Drive PN: H233287Main Description As Following : A-H233287 Sprocket, Gathering Chain Drive P.N: H233287 Inside Diameter: 1.005"Outside Diameter: 4.728"Replaces: H221814Teeth: 8 Crossed From: AMH233287 , , AV104547 VAPORMATIC , H221814 JOHN DEERE , SH333887 SHOUP , WN-H233287 , , WNH233287 , Found in Section & Models : Headers/Platforms/Feeder House > Corn Head Parts, John Deere HEAD, CORN: 606, John Deere HEAD, CORN: 608, John Deere HEAD, CORN: 612 Associated Items : New Also This is An Aftermarket Product And : Inside Diameter: 1.005" Outside Diameter: 4.728" Replaces: H221814 Teeth: 8