1.Aluminum foil materials ; 2.Stand up shape,; 3.Zipper open ,gloosy finished 4.Silvery color ,for ... Features 1.Three-side heat sealed ,gloosy finished ; 2.Stan up bag with ziplock open ,various size and thickness; 3.Aluminum ... manufacture ,not trading company.If you would like to discuss an order with us,please kindly let us know your bag ...