This high-quality 20 cubic foot steel helium cylinder is perfect for a variety of applications, including balloons and industrial uses. Featuring a durable CGA580 valve, it can be used with helium, nitrogen, or argon gases. With a 5.25-inch diameter and 18"-inch height, this cylinder is compact and easy to transport. DOT Approved. Please note that all cylinders ship empty, so you'll need to consult your local compressed gas supplier for filling needs. Due to the current nationwide helium shortage, it's recommended to locate a helium filler in your area before purchasing.