HTD Timing Belt Pulley For Belt Series HTD For Belt Width 20 mm For Bushing Size H QT For Bushing Type Quick Detachable For Use With HTD Belts Material Steel Maximum Bore Diameter 1 1/2 in Minimum Bore Diameter 3/8 in Number of Teeth 30 Outside Diameter 3.346 in Pitch 8 mm Pitch Diameter 3.008 in Face Width 1.125 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide For Belt Trade Size HTD