This 20oz. aluminum tank features a micro on/off switch in the valve which makes attaching & removing your tank a breeze! Slightly wider and taller than a 12 oz. tank but holds 67% more CO2! One of the finest tanks on the market! Yields over 500 shots (can vary significantly by gun type, shooting style, elevation and other atmospheric conditions). Features a lightweight, yet durable aluminum cylinder fitted with the Deluxe Pure Energy on/off valve with integrated safety burst disk. This tank is designed to last on rentals or as a personal tank. Be careful of cheaper tanks that use an inferior valve that may leave after a short time. The Pure Energy tank features a 1 year 'no leak' manufacturer's warranty. Made in USA.