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 CONVERSION & INFLATION: 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 economical inflation process without requiring a dedicated paddleboard pump. MULTI-PURPOSE DESIGN: Includes 4 different nozzle types. Eliminates the need for a special rubber boat pump. Features a standard Schrader fitting compatible with most air compressors or bike/tire pumps. Note: Upon opening, please check carefully—4 nozzles are included, nested together to save space. WIDE APPLICATIONS: Compatible with most paddleboards, canoes, rubber boats, inflatable kayaks, dinghies, inflatable beds, floating docks, pool floats, and similar inflatable products. If compatibility issues arise, please reach out for support. 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