Features 1、Made of good quality PVC and material, solid, sturdy 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. Specification Features: 1. Made of good quality PVC and material, solid, sturdy 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 inch Compatible Valve: 6-hole, 8-hole Valve Weight: Approx. 80 g Packing List: 1 * Air Pump Pressure Gauge Note: 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 it can be used with an air pump or directly connected to the kayak for pressure measurement Package List 1 * Air Pump Pressure Gauge