... metal OEM Material:stainless steel surface treatment 1)Key specification Material: steel color:black2) Description: Professional OEM ... and tempered,tempering,carburizing,nitriding,carbonitriding and so on.6.Surface Treatment:Include plating of Ni,Cr3+,Zn-Ni,Dacromet,No chrome ... Small Orders Accepted Tel:86-574-88071279 Welcome any inquiry! surface treatment