1)piano hinge 2)different material stainless steel, iron 3) ... hinges, car hinges, carriage hinges, stainless steel & iron hinges.2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment: ... , silver4, Products specification:Products specification: 1800*25*0.5mm,Other specifications can also be customized, as followed,Thickness: ... 72 inches piano hinges with the lowest factory price