Feature:1. Made of high quality ABS material, light and impact resistant, sea water resistant, strong and durable, easy to repair and maintenance.2. Poisonless and tasteless silica gel bite, ergonomic design, soft and comfortable and easy to bite, prevent masseter muscle fatigue.3. Diversion channels draw air from both sides so that bubbles do not block the line of sight.4. Adjustable knob can be twisted to adjust the size of the air output, so that the breathing is light, natural and smooth, stable and reliable performance.5. Brass chrome plated hose connection, strong connection, corrosion resistance, high hardness, durable.Specification:Item Type: Secondary Breathing RegulatorMaterial: ABS + PP + SiliconeWeight: Approx.361g/12.7ozMedium Pressure: 140Psi(9.7Bar)Air Supply: 3000Psi.Package List:1 x Secondary Breathing Regulator1 x ManualNote:After each dive, wash it with clean water as soon as possible. After washing, keep it in a cool place and not expose it to the sun.