... , reasonable price 3. No noise, high efficiency NOVO's timing pulley:1. Plain bore: MXL, XL, L, H; T2.5, ... T5, T10; AT5, AT10; HTD 3M, 5M, 8M, 14M.2. Taper bore: XL, L, H, XH; HTD 5M, 8M,14M.3 ... most competitive in European market 2.Material:Plastic 3.Belt pulley, non-standard or standard ,OEM availableWhat we have: Our ... :We've been ISO9001:2000 certified since 2003. HTD Taper bush pulleys