Features: Primary pressure reducing valves: hard chlorinated and hardened surfaces, anti-stamping and corrosion resistance, durable and stable. Total valves switch: the gas-source can be completely closed to ensure no leakage in storage, and the gas-outflow required by each person can be adjusted. Plastic Breathing Valves: Lightweight and durable, the PC case is strong and durable. 360 rotating head: 360 free rotation, adapt to any posture underwater, and breathing freely for free diving. Pressure gauge: With luminous function, it is still clear at 30 meters underwater. The stainless steel material is waterproof, has high corrosion resistance and hardness, and is compressive and durable. High-pressure gas-storage tank: high-quality aluminum material is selected, and the surfaces is sprayed with plastic, which is resistant to high pressure, impact and seawater corrosion. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Aluminum 6061-T6 Capacity: 1L