New 6 blade fan has a 23" diameter, 1.5" pilot hole, and mounting holes on 2" center. This fan fits multiple John Deere models. Dim A (1) 23" Diameter Dim B (2) 1 1/2" Pilot Hole Dim C (3) Mounting Holes On 2" Centers John Deere TRACTOR: 4320 John Deere TRACTOR: 4520 John Deere TRACTOR: 4620 John Deere TRACTOR: 7020