HIGH-QUALITY MATERIAL: Made from high-strength hard plastic and alloy, featuring a solid structure, labor-saving design, high-pressure resistance, and strong seal leak protection. Note: The air valve adapter is only suitable for hose fittings. EASY INFLATION PROCESS: Use a manual SUP pump to inflate the board to approximately 3 or 4 PSI, then connect to a portable air compressor until reaching 14 PSI. This method provides an efficient and cost-effective inflation solution without requiring a dedicated paddleboard pump. MULTI-PURPOSE DESIGN: Includes 4 different nozzle types. Eliminates the need for a specialized rubber boat pump. Features a standard Schrader valve fitting compatible with most air compressors or bike/tire pumps. Note: Upon opening, please check carefully—4 nozzles are nested together to save space. WIDE APPLICATION: Fits most paddleboards, canoes, rubber boats, inflatable kayaks, dinghies, floating docks, inflatable pools, inflatable beds, and similar inflatable products. If compatibility issues arise, contact the seller for support. Material: PVC + Alloy Color: Red / Blue Nozzle Dimensions: Round Head: 0.62 in (16 mm), Sharp Head: 0.23 in (6 mm), Square Head: 0.71 in (18 mm), Helicoidal Head: 0.78 in (20 mm) Package List: 1 x Air Valve Adapter