PCGT Timing Belt Pulley For Belt Series Poly Chain GT Carbon For Belt Width 68 mm For Bushing Size 4535 For Bushing Type Taper Lock For Use With Poly Chain GT Carbon Belts Material Cast Iron Maximum Bore Diameter 4 15/16 in Minimum Bore Diameter 1 15/16 in Number of Teeth 168 Outside Diameter 29.365 in Pitch 14 mm Pitch Diameter 29.475 in Face Width 3.328 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility