1)industrial hinge 2)material stainless steel, iron 3)used for huge door,chass 4)good antirust functional ... :Long hinges, piano hinges, car hinges, carriage hinges, stainless steel & iron hinges.2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment ... : 20 piece /plastic bag, 5 plastic bag/knit bag, special packing is acceptable.6, Delivery time: Within 7 days after receiving ...