... Steel ,Aluminium, Brass, SS. rubber 3)OEM fitting for hose,tube Material: Carbon Steel ,Aluminium, Brass, SS. rubberSurface treatment:: Zinc/Chromium ... /Nickel plating, Oxide coating.Colour : army green ,red, white, blue ,yellow ,black, gold, silver , etc. Items: male, female ... ,OtherMetal accessories, rubber accessories, plastic accessories fitting for hose and tube