Constructed of aluminum for a lighter weight, this refillable cylinder from Brass Eagle provides up to 400+ shots per fill in most playing conditions. It comes complete with valve assembly and is compliant with the standards of the American Standard for Testing and Measurements (as are all Brass Eagle tanks). Note: Cold weather will reduce gas efficiency. About Brass Eagle Brass Eagle is one of the leading designers, manufacturers, distributors, and marketers of a complete line of products for the rapidly growing sport of paintball. The Brass Eagle brand has secured its dominant leadership position over the past several years as the sport has gained a broad acceptance through the company"s efforts to make paintball more accessible and affordable to new participants. As more and more people experience the fun and excitement of paintball, the game"s following continues to grow at an exceptional rate.