When ordering multiple tanks, please create separate orders for each tank or call us at 858.581.2800 to order, to ensure accurate shipping rates This is the Sherwood Aluminum 100 CF Scuba Diving 3300 psi Dive Tank Features: Sherwood Quality! Pressure (psi): 3300 psi Diameter: 8 in. Weight: 46.2 lbs Buoyancy Full (lbs): -7.8 lbs Length Including Valve: 30.3 in. All cylinders include standard valves** C100 or COMPACT 100 CF tank Quality Dive Gear at Affordable Prices! **You can opt to replace this with an upgrade to a converter valve."