HIGH-QUALITY MATERIAL: Made from high-strength hard plastic and alloy, featuring a solid structure, labor-saving design, high-pressure resistance, and strong sealing for leak protection. Note: The air valve adapter is only suitable for hose fittings. EASY INFLATION & EFFICIENT USE: Use a manual SUP pump to inflate the board to approximately 3 or 4 PSI, then connect a portable air compressor to reach the recommended 14 PSI. This method provides an efficient and cost-effective inflation process without requiring a dedicated paddleboard air pump. MULTI-PURPOSE DESIGN: Includes 4 different nozzle types. Compatible with standard Schrader valve connections, allowing use with most air compressors or bike/tire pumps. Note: The package contains 4 nozzles nested together to save spaceplease check carefully upon opening. WIDE APPLICATION: Fits most paddleboards, canoes, rubber boats, inflatable kayaks, dinghies, inflatable beds, pools, rafts, and other inflatable water gear. If compatibility issues occur, please contact the seller directly. Material: PVC + Alloy Color: Red / Blue Nozzle Sizes: Round Head: 0.62 in (16 mm), Sharp Head: 0.23 in (6 mm), Square Head: 0.71 in (18 mm), Helical Head: 0.78 in (20 mm) Package List: 1 x Air Valve Adapter