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【4 Specifications & Multi-Interface Design: Instantly Reach Multi-Device Compatibility】 The package contains 4 kayak pump adapter kit of different specifications, specifically engineered to solve the pain point of inconsistent valve sizes across multiple brands of inflatable equipment. When in use, simply select the corresponding adaptor according to the inflation port size (such as SUP paddleboards, rubber boats, air mattresses, etc.) to snap it directly in place. This eliminates the need to purchase multiple dedicated air pumps for different gear, effectively reducing the equipment ownership costs of outdoor travel and gear storage. 【Tool-Free Quick-Twist Connector: Manual Thread Rotation Locks in One Second】The air valve adapter features a tool-free, quick-connect design. The smaller end uses standard metric threads, which can be screwed directly into the connector line of a household electric air pump or manual pump, while the other end plugs directly into the target auxiliary air valve. Easy to install and remove, it allows for rapid swapping and shifting between different air valves and pump hoses, significantly shortening the preparation time for outdoor inflation. 【Thickened High-Pressure Seal: Built-In Washer Blocks High-Pressure Air Leaks】Each sup pump adaptor is precision-fitted with an anti-drop black rubber sealing washer, which, combined with the high-pressure-resistant plastic outer shell, forms a double leakproof barrier. When facing extreme scenarios requiring high-pressure inflation (such as the 15 PSI high-pressure injection for SUP paddleboards), the built-in washer deforms under air pressure to seamlessly fill the joint gaps, blocking high-pressure gas backflow or leakage and preventing low inflation efficiency or pump overheating. 【High-Airflow Channel: High-Pressure Rapid Inflation and Complete Deflation】The internal channel of the sup pump adapter is optimized with widened resistance to support high-volume dual-way airflow transmission. During inflation, it maximizes the transmission of the air pressure output by the pump, reducing waiting times; when water sports are over and it is time for storage, it can be inserted directly into the valve to bypass the single-way valve lock, achieving rapid and complete air extraction and deflation. This makes the folding and storage of large gear like paddleboards and kayaks more compact, facilitating easy loading into the car boot. 【Wear-Resistant Plastic Material: Compact Body Adapts to All Water Sports Scenarios】 The sup kayak adaptor is made of plastic, possessing outstanding compressive strength, wear resistance, and sun-exposure lifespan, preventing it from easily cracking or deforming in damp or sun-drenched lake and beach environments. The overall size is compact, allowing it to be easily carried in a pocket or buoyancy aid pocket. It is widely applicable to the vast majority of SUP paddleboards, canoes, rubber assault boats, swim rings, floating mats, and air mattresses on the market, covering both household and outdoor water systems.