High-tensile Zinc plated silver D-bolts for BENZ 1.Material:40 Cr 2.Grade:10.9 3.Finish:Zinc coating 4.High-tensile ... CHANG JIN AUTO PARTS CO.LTDOur Production: Wire-Drawing-Forming ... 4135),42CrMo. 5.Surface Protection: Black oxide,Protective oil,Phosphated,Zinc plated,Dacromet, Bake painting,Polishing. 6.Colors: Black,grey,golden,silver ...