Plastic gears, 1.Material:stainless steel, C45,POM,nylon 2.0. ... .6 , 0.7, 0.8,1 module 3.OEM offered Plastic gears,1. Material: Alloy Steel, Carbon Steel, Stainless Steel, Hardended ... & Tempered Steel, Cast Iron, Aluminum, Copper, Brass and so on2. Heat Treatment: Hardening and Tempering, High Frequency Quenching, Carburizing Quenching and ...