2 Pcs Air Valve Inflatable Boat Anti-leakage Air Valve One-way Inflation The air valve inflatable boat screw is made of high-quality high-density ABS plastic. The air bed replacement valve is durable and has the characteristics of seawater corrosion resistance, leakage prevention and long service life. 20mm spiral air valve is a good substitute for inflatable boats. The gas valve cover is designed and sealed to ensure leak-proof inflation. The upper diameter/length of threaded parts is 22mm (outer)/17mm (inner), and the lower diameter/length of threaded parts is 22mm (inner, outer)/20mm (inner). The rubber pad at the bottom of the air plug can effectively prevent leakage and provide you with safer protection. One-way inflation valve, rapid inflation, brings you excellent leak-proof performance. The inflatable ship-shaped spiral air plug can be installed in the piston hole of about 20mm, which can quickly inflate and exhaust, saving your time. It is applicable to most inflatable boats, rafts, rubber boats, etc. Please pay attention to the size before purchase. Our gas nozzle is not applicable to all sizes of hovercraft and inflatable boats, and special sizes are not applicable, such as mesh boats.