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 & TIME SAVING: Use a manual SUP pump to inflate the board to approximately 3 or 4 PSI, then connect a portable air compressor to reach up to 14 PSI. This method provides an efficient and cost-effective inflation process without requiring a dedicated paddleboard air pump. MULTI-PURPOSE USE: This air valve adapter includes 4 different nozzle types. It eliminates the need for a special rubber boat pump. The SUP pump adapter features a standard Schrader valve fitting, compatible with most air compressors or bicycle/tire pumps. Note: When opening the package, please check carefully—4 nozzles are included, nested together to save space. WIDE APPLICATION: Fits most paddleboards, canoes, inflatable boats, rafts, floating docks, inflatable pools, inflatable beds, dinghies, and kayaks. If you experience compatibility issues with your paddleboard, please contact the seller directly. Material: PVC + Alloy Color: Red / Blue Nozzle Sizes: Round Head 0.62in (16mm), Sharp Head 0.23in (6mm), Square Head 0.71in (18mm), Helical Head 0.78in (20mm) Package List: 1 x Air Valve Adapter