Lid and pull ring with aluminum is mainly from the south-west of aluminum and Nanshan aluminum, aluminum –magnesium alloy 5182 H19, 5052 H19, which is ordinary aluminum added Mn and Mg components, increase of tensile strength and elongation. By Henkel cleaning agent and food-grade chrome agent, this product uses the United States PPG epoxy-phenolic packaging coating, and local high quality Dos oil.