Features & Details - High-Quality Aluminum Alloy: 8.8-pound aluminum carbon CO2 cylinder dispensing draft beer and other beverages. The bottle body is made of high-quality new aluminum alloy, lightweight and corrosion-resistant. - Gray Powder Coating: The CO2 tank's outer layer is coated with gray glossy powder epoxy resin, which is more beautiful and durable and prevents corrosion and abrasion of the bottle body. - Strong Stability: A 5-pound gas can hold approximately 6-8 small barrels of beer. The working pressure of each aluminum cylinder is up to 1800 PSI/124 BAR, with a test pressure of 3000 PSI/207 BAR. - Dual Certification: The aluminum Co2 tank's exterior is covered with double certification marks from the US Department of Transportation (DOT) and the Canadian Transportation Department (TC), with fresh certification dates. - 320 CGA Certification: The 320 valve is CGA...