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 ... .3. Surface Treatment: Galvanizing/Zincplating, Dacrotized, Black Anodic Treatment, Spray Printing, Mirror Finish, Burnishing, Sand-blasting and so on according to ...