This is a A-364320A2 Pulley, Separator Driven PN: 364320A2Main Description As Following : A-364320A2 Pulley, Separator Driven P.N: 364320A2 Inside Diameter: 3.507"Outside Diameter: 14.75"Pulley Grooves: 5 Crossed From: AV100377 VAPORMATIC , WN-364320A2 , , WN364320A2 , Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : Inside Diameter: 3.507" Outside Diameter: 14.75" Pulley Grooves: 5