This is a A-413164A1 Pulley Assy, Variable Rotor Drive PN: 413164A1Main Description As Following : A-413164A1 Pulley Assy, Variable Rotor Drive P.N: 413164A1 Dim A (1): 20.500" O.D.Replaces: 411407A1 Crossed From: AM413164A1 , , AV100467 VAPORMATIC , WN-413164A1 , , WN413164A1 , , 411407A1 CASE-IH Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : Outside Diameter: 20.500" Replaces: 411407A1