HIGH-QUALITY MATERIAL: Made of high-strength hard plastic and alloy, solid structure, labor-saving, resistant to high pressure, strong sealing leak protection. Note: PeSandy air valve adapter is only suitable for the hose connection. EASY CONVERSION & SAVE YOUR INFLATION: You can use a manual SUP pump to inflate the SUP board to about 3 or 4 PSI first, and then connect it to the portable air compressor until it reaches 14 PSI. This is an ideal inflation process. It is also the most economical inflation as it does not require a dedicated paddle air pump. MULTI-PURPOSE: PeSandy air valve adapter has 4 different joints. With it, you don't need to buy a special inflatable boat pump. The SUP pump adapter uses a standard Schrader fitting to connect with an air compressor or bicycle/tire pump. Please note: When you open the package, do not think that there are only 2 nozzles. There are 4 nozzles that will be nested to save package space. A WIDE RANGE of APPLICATIONS ] - Suitable for most paddleboards, canoes, inflatable boats, assault boats, flush pools, floating rows, inflatable beds, dinghies, kayaks, etc. If your paddleboard is not suitable for these inflatable adapters, please contact us in time. Material: PVC + Alloy. Color: Red / Blue. Inflatable size: Round-Head is 0.62in(16mm), Sharp-Head is 0.23in(6mm), Square-Head is 0.71in(18mm), Heliciform-Head is 0.78in(20mm). Package list: 1 x Air Valve