... XXH T2.5 T5 T10 T20 3M 5M 8M 14M). Metric T-Series Timing Pulleys :T2.5,T5,T10,T20,AT5 ... , 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. 2. Grade: Can up to GB8 ...