... 3M 5M 8M 14M). Metric T-Series Timing Pulleys :T2.5,T5,T10,T20,AT5,AT10,AT20.HTD ... XL, L, H,XH,XXH Pulleys . Metric and Inch Bore Taper Bushings for Sprockets, Sheaves and Timing Pulleys . Super-Torque Timing Pulleys1. Material ... : Stainless Steel, Brass, Aluminum, POM, and other standard machineable material. ...