Timing Belt Pulleys Bore Diameter 3/8 in For Belt Series L For Belt Width 1/2 in For Use With L Belts Material Steel Maximum Bore Diameter Not Applicable Number of Teeth 10 Outside Diameter 1.438 in Pitch 0.375 in Pitch Diameter 1.194 in Bore Type Fixed Face Width 0.75 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide For Belt Trade Size L Hub Diameter 13/16 in Hub Projection 1/2 in