Features 1、Large Capacity Tank: The oxygen cylinder is made of aviation aluminum, with high pressure gas storage, not easy to be corroded by seawater, with 3L large capacity. 2、Backpack Design: Adjustable shoulder straps, the backpack has adjustable shoulder straps and quick release buckles for easy putting on and taking off gear. 3、Gas Filtration: With three layer filtration system, which can protect the valve core and effectively prevent dust and magazines from being inhaled by the human body. 4、Extended Tube: The extended tube is connected to the pressure gauge, which keeps the gauge within the visible range and convenient for inspection of the remaining air. 5、Flexible Adjustment: Equipped with 360 degree swivel joint, can rotate freely, adapt to any posture underwater, widely used in diving, underwater production, etc. Item Type: Scuba Diving Tank Kit Material: Aviation aluminum + copper Breathing Time: 30-50 minutes (depending on lung capacity) Head Color: Black Maximum Pressure: 20MPA, 3000PSI, 200BAR Package List 1 x Respirator 1 x Shoulder Backpack 1 x Swimming Goggles 8 x Sealing Ring 1 x Gasket 1 x Instruction Manual 1 x Oxygen Cylinder