... -quality alloy steel 3.Surface treatment:self-color 1, Alloy chain is designed and manufactured for superior performance and usage.It ... ,EN,DIN and so on6.Surface treatment:self-color,polishing,plastic coating,hot-dip galvanized,electro-galvanized,etcITEM NO. Size Width ... you have any questions,please tell me no hesitate. Galvanized chain