Coating Raw Material Coating Type Zinc plated Black zinc plated Yellow zinc plated Zinc nickel Raw Material Steel 4.8 Stainless Steel A2 Stainless Steel A4 Polyamid PA 6.6 DDKK M23,81,20M2,54,71,51M35,61,651M47,52,22M59,22,52M61133M814,544M101854