PCGT Timing Belt Pulley For Belt Series Poly Chain GT Carbon For Belt Width 21 mm For Bushing Size 2012 For Bushing Type Taper Lock For Use With Poly Chain GT Carbon Belts Material Cast Iron Maximum Bore Diameter 2 in Minimum Bore Diameter 1/2 in Number of Teeth 53 Outside Diameter 5.625 in Pitch 8 mm Pitch Diameter 5.314 in Face Width 1.25 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide