1)industrial hinge 2)material stainless steel, iron 3)used for huge door,chass 4)good antirust functional 5) ... Long hinges, piano hinges, car hinges, carriage hinges, stainless steel & iron hinges.2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment ... specifications can also be customized, as followed,Thickness: 0.5mm-3.0mm;Length: 20-6000mm,Width: 25-150mm5, Package specification: ...