... machining, Strict inspection. 2. non-standard, OEM available belt pulley 1. Good quality raw material, Precision machining, Strict ... and specifications, specializing in non-standard items. Product Name: belt pulley Feathures:1. Material: Alloy Steel, Carbon Steel, ... Iron, Aluminum, Copper, Brass and so on 2. Heat Treatment: Hardening and Tempering, High Frequency Quenching, Carburizing Quenching and ...