1)door & window hinge 2)material Zinc alloy 3)used for industrial,household 4)good antirust functional 5) ... delivery quickly Hinge products introduction as following:1, Material:Zinc alloy2, Surface treatment:polishing3, Package specification:1 pair/plastic bag, 50pairs/carton, special ... prices! Details can inquire or conversation online. provide different size door & window handle,Zinc alloy handle