Feature 1Made of good quality PVC and material, solid, durable and corrosion-resistant. 2External silica gel to resist abrasions for long time use. 3Designed to help ensure that inflatable kayaks, boats, surfboard, beds with safe and correct pressure. 4Long hose adapters for valves and pump hoses. It can only be used alone. 5Pressure gauge showing up to 0.6bar or 8.55 psi.SpecificationFeatures: 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 andcorrect 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 Gauge .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Note:This product is only suitable forgeneral 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.