... Cr 2.Quality Grade:10.9 3.Surface Finish:Silver Zinc Galvanized 4.High Hardness&Accurate Size CHANG JIN AUTO PARTS CO ... 4135),42CrMo 4.Surface Protection: Black oxide,Protective oil,Phosphated,Zinc plated,Dacromet, Bake painting,Polishing. 5.Colors: black,grey,golden ...