1)industrial hinge 2)material stainless steel, iron 3)used for huge door,chass 4)good ... hinges, piano hinges, car hinges, carriage hinges, stainless steel & iron hinges.2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment ... copper-plated, and zinc-plated Spraying: golden, white, rice white, black, rice yellow, silver4, Products specification:Products specification: 1800*25*0 ...