High-Quality Aluminum Alloy 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 prevents corrosion and abrasion of the bottle body. Strong Stability with a working pressure of up to 1800 PSI/124 BAR. Dual Certification from US Department of Transportation (DOT) and Canadian Transportation Department (TC). 320 CGA certified valve with external threads compatible with CO2 regulators.