Features 1、Adjustable Shoulder Strap: The backpack features adjustable shoulder straps and quick release buckles for easy access to gear and easy use, saving you energy and time. 2、Deep Filtration: 3 layer filtration, can protect the valve body inner core, and can effectively prevent impurities from being inhaled by the human body, protect your normal breathing, better protect you. 3、High Grade Materials: The product is made of aviation aluminum, the surface is sprayed with plastic process, high pressure gas storage, not easy to be corroded by seawater, quality assurance, to provide guarantee for your diving work. 4、Loading Tube: In order to check the remaining air in the cylinder during diving, we use an extension tube to connect the pressure gauge. You can keep the pressure gauge in visual range for easy inspection. 5、Backpack Style: Designed to look like a backpack, easy to carry underwater, can be widely used in diving, underwater production, etc., conducive to your free movement, to provide convenience for diving work. Item Type: Scuba Tank Diving Gear Weight: 8100g/285.7oz Respirator Material: aviation aluminum and copper Breathing Duration: 30-50 minutes (depending on individual lung capacity) Valve Head Color: black Package List 1 x Respirator 1 x Double Shoulder Strap with Back Clip 8 x Sealing Ring 1 x Gasket 1 x Instruction Manual 1 x Oxygen Tank