... , T5, T10; AT5, AT10; HTD 3M, 5M, 8M, 14M.2. Taper bore: XL, L, H, XH; HTD 5M, 8M,14M.3 ... (Mainland).What we manufacture and where we sell:timing belt pulleys,locking assemblies,torque limiter, gear,couplings,shaft,gears,sprockets andprocessing ... qualityCertification:We've been ISO9001:2000 certified since 2003. HTD Taper bush pulleys