Edelbrock Nitrous Bottle #72315 is made from aluminum alloy and has a 15 lb. capacity. Includes an Edelbrock high flow CGA approved valve with a built-in siphon tube for consistent performance, Racer Safety Blow-Off Adapter and a liquid-filled nitrous pressure gauge pre-installed. It also features a venting system to prevent pressure increases beyond the safety level and is D.O.T. approved. This bottle has a silver powder coated finish.