ITEM NAME:Air Safety Valve Screw Lock Air Valve Nozzle PVC Sturdy Anti-Corrosion Descriptio n Description: The gas in the ship is automatically deflated to a certain pressure to reduce the internal pressure of the hull. Safety valve pressure relief value: 4.5-6psi (It may trigger a deflation when the air pressure reaches 4.5-6 PSI) Specifications: material: plastic color: grey Size: 53.4*32.5mm Weight: 67g Package Included: Product list: bleed valve *1 Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! Air Safety Valve Screw Lock Air Valve Nozzle PVC Sturdy Anti-Corrosion.We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.