Parker Hannifin Corporation”s one-piece formed steel auxiliary gas bottle comes in standard sizes from 2.5 to 50 gallons. The new design features a standard machined port in place of the traditional modular port assembly to provide a simple and reliable, gas-tight threaded connection, with reduced potential leak paths. Specifically designed as a cost-effective alternative to the Bladder and Piston style gas bottles, the one-piece bottle design features a single standard machined No. 5 SAE o-ring port that can be used to install a plug or gas valve. A standard No. 24 SAE threaded o-ring port is also provided to connect the gas bottle to the accumulator system. All bottles are ASME-certified and “U” stamped. The new design comes in the following sizes: 2.5-, 5-, 10-, 15- and 20-gallon gas bottles with 9-inch. O.D; And 25-, 30-, 40-, 45- and 50-gallon gas bottles with 14-in. O.D. – parker.com/accumulator