stainless steel hinge Stainless steel, copper, aluminum, iron Surface treatment: Electroplating: gold-plated, copper-plated, and zinc-plated Spraying: golden, white, rice white, black, rice yellow, silver Products specification: Products specification: 1800*25*0.5mm,Other specifications can also be customized, as followed, Thickness: 0.5mm-3.0mm; Length: 20-6000mm, Width: 25-150mm Package specification: 20 piece /plastic bag, 5 plastic bag