5 in 1 design: 1 rowing boat air valve adapter + 4 conventional air valve attachments. 4 conventional air valve fittings to meet the inflation requirements of most equipment. With it, you don't need to buy other connectors. High Quality Material: Made of hard plastic and alloy, it has solid structure, high pressure resistance, strong sealing , leak-proof, alloy valve end provides leak protection and long-lasting use. Wide Application: The boat air valve adapter kit is suitable for most paddle boards , canoes, kayaks, assault boats, motorboats, swimming pools, floating platoons, inflatable beds, etc. Easy conversion and quick inflation: easy to inflate and deflate. The operation is very simple, first select the appropriate connector according to the inflation interface. Then use a compressor or tire pump to easily reach the recommended psi in 5-10 minutes. The larger inflation pump you use, the faster the inflation. Convenient: Lightweight and portable, easy to carry and store. No need to carry different kinds of inflatable tools. Reduce your burden.