1.Material:35CrMo/42CrMo 2.Finish:Black Oxide&Oil Protection 3.High-quality&Low Price 4. ... (SAE 5140),35CrMo(SAE 4135).42CrMo. 5.Surface Protection: Black oxide,Protective oil,Phosphated,Zinc galvanized, Dacromet,Bake painting,Polishing. ... 6.Colors: Black(Black Oxide),Grey(Phosphated),Golden Yellow,Silver White(Zinc Galvanized),Any Colors ...