Use this great High Pressure 6 cu ft. spare tank when in any type of emergency situation Features of this fantastic item include: A must have for your dive Comes with a yoke design valve 6 cu ft. about 0.9 liters Pressure: 3000 PSI Length without valve: 10.80 Diameter: 3.21" Weight with valve: 3.9lbs Buoyancy full: -1.5lbs Buoyancy 500 PSI: -1.1lbs Sherwood Valve model #5000K-48 High visibility yellow makes it easy to locate Attach your regulator or octo for a complete high pressure, emergency tank Make sure your next dive is a safe one with this great emergency tank.