Aluminum cylinder type M60 complete with CGA-540 valve installed. Capacity: 1699 liters. Every cylinder is produced from high strength aluminum alloy 6061-T6.All seamless aluminum alloy compressed gas cylinders are manufactured in accordance with DOT 3AL and 3AL requirements. Every cylinder is inspected and tested by a DOT and TIC authorized independent inspection agency. Capacity: 1699 liters Diameter: 7.25 inches Pressue: 2216 psi Length: 23.1 inches