Aluminum gas cylinders are ideal to store industrial and specialty gases because of lightweight, non-magnetism, and corrosion resistance. NET's high pressure seamless gas cylinders are made by quality aluminum 6061 and manufactured strictly in accord with national and international safety standards, which assures consistency of wall thickness, weight and performance. They are the first choice to fill and refill various kinds of industrial gases, high purity gases and calibration gases. Advanced technology has reduced the producing cost, and makes our customer gain more. High standard quality control and detailed instruction for use & maintenance make sure safety operation and performance. Please google 'NETCYLINDERS'to find our web to learn more.