1)industrial hinge 2)material stainless steel, iron 3)used for huge door,chass 4)good antirust ... hinges, piano hinges, car hinges, carriage hinges, stainless steel & iron hinges.2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment ... hinge and bolt, small hinge, AA column, aluminum ladder column, stainless steel ladder column, stainless steel bracket. Carrying large stocks with ...