This is a premium 10LB / 27 cu. ft. aluminum CO2 cylinder with a brushed aluminum finish and a common CGA-320 valve. Includes a durable plastic carry handle that also protects the valve area. Compatible with our regulators, brackets and accessories. Shipped empty. Fill it at your local gas/welding/industrial supply / paintball supply / fire extinguisher service / scuba shop, etc, locations. If you want a complete CO2 system just grab a mounting bracket, regulator and hose and you're good to go. We've got valve outlet perma seals and cylinder boots if you want to fancy it up a little.