This is a A-H217454 Sheave Half, Variable Drive Outer PN: H217454Main Description As Following : A-H217454 Sheave Half, Variable Drive Outer P.N: H217454 A-H217454 Sheave Half, Variable Drive Outer P.N: H217454 Crossed From: WN-H217454 , Found in Section & Models : Headers/Platforms/Feeder House > Feeder House Parts, John Deere COMBINE: S650 (High Torque Variable Speed), John Deere COMBINE: S660 (High Torque Variable Speed), John Deere COMBINE: S670 (High Torque Variable Speed), John Deere COMBINE: S670 HILLMASTER (High Torque Variable Speed), John Deere COMBINE: S690 (High Torque Variable Speed), John Deere COMBINE: S760 (High Torque Variable Speed), John Deere COMBINE: S770 (High Torque Variable Speed), John Deere COMBINE: 9660 (High Torque), John Deere COMBINE: 9660STS (High Torque), John Deere COMBINE: 9670STS (High Torque), John Deere COMBINE: 9760STS (High Torque), John Deere COMBINE: 9770STS (High Torque), John Deere COMBINE: 9860STS, John Deere COMBINE: 9870STS (High Torque) Associated Items : New Also This is An Aftermarket Product And : Inside Diameter: 3.780" Outside Diameter: 17.4'