... anodized, Nitriding, Dichromate.5. Teeth Number is from 9 to 216.Specifications1.high quality and most competitive in European market ... , China(Mainland).What we manufacture and where we sell:timing belt pulleys,locking assemblies,torque limiter, gear,couplings,shaft,gears, ... sprockets andprocessing with supplied drawings.The products are sold to USA,UK,Spain,Germany,Italy,Poland and other regions ...