1、Made of good quality PVC and material, solid, durable and corrosion-resistant. 2、External silica gel to resist abrasions for long time use. 3、Designed to help ensure that inflatable kayaks, boats, surfboard, beds with safe and correct pressure. 4、Long hose adapters for valves and pump hoses. It can only be used alone. 5、Pressure gauge showing up to 0.6bar or 8.55 psi. Features: 1. Made of good quality PVC and material, solid, durable and corrosion-resistant. 2. External silica gel to resist abrasions for long time use. 3. Designed to help ensure that inflatable kayaks, boats, surfboard, beds with safe and correct pressure. 4. Long hose adapters for valves and pump hoses. It can only be used alone. 5. Pressure gauge showing up to 0.6bar or 8.55 psi. Specifications: Material: PVC + Silica Gel Color: Black Measuring Range: 0-5 PSI Gauge Diameter: Approx. 3.8 cm/ 1.50 inch Valve Diameter: Approx. 1.96 cm/ 0.77 inchCompatible Valve: 6-hole, 8-hole Valve Weight: Approx. 80 g Packing List: 1 * Air Pump Pressure GaugeNote:This product is only suitable for general kayaks, assault boats, and inflatable boats, and the maximum air pressure is 5PSI. It is directly plugged into the kayak interface for use, and cannot be connected to an air pump.