... . No noise, high efficiency NOVO's timing pulley:1. Plain bore: MXL, XL, L, H; T2.5, T5, T10; AT5, AT10; HTD ... .5. Teeth Number is from 9 to 216.Specifications1.high quality and most competitive in European market 2.Material:Plastic 3.Belt pulley ... province, China(Mainland).What we manufacture and where we sell:timing belt pulleys,locking assemblies,torque limiter, gear,couplings,shaft,gears,sprockets ...