Product Description High quality Worthington 80cf aluminum scuba cylinder designed for neutral-to-slightly negative buoyancy when empty, includes Thermo Pro International valve. 3300 psi working pressure, 7.25" dia. Available in Brushed Aluminum finish. Optional XS Scuba Pro Convertible valve, Thermo 300 Bar DIN valve, XS Scuba Modular Pro valves, Thermo Modular Pro valves, XS Scuba Modular 300 Bar DIN valves & Thermo Modular 300 Bar DIN valves available.