... The products introduction as following:1, products name:Stainless steel hinge2, Material:Stainless steel, copper, aluminum, iron3, Surface treatment:Electroplating ... , for example: piano up and down cross board hinges, long doors and accessorize box hinges, ... small hinge, AA column, aluminum ladder column, stainless steel ladder column, stainless steel bracket. Carrying large stocks with great quality ...