High Quality The inflatable marine valve is made of high-quality, high-density ABS plastic, which is strong, corrosion-resistant and durable. One-way InflationThis valve is a one-way inflation valve, suitable for rapid inflation.The valve cover ensures air leakage. DesignThe fine design of durable air valve with a valve cap ensures anti-leak inflation.The diameter/length of Threaded part is 20mm / 17mm .Please check size to make sure whether your valve bung fit this plug before purchase. Good ComponentInflatable Boat Valve comes in pair, the Inflatable Tube is a good replacement accessory for your inflatable boat.After inflation of your inflatable product by the valve, DO NOT use the product immediately! Leave your inflatable product inflated for 2 hours at least, to test if there is any tiny air leakage. especially for inflatable boats. Widely ApplicationOur inflatable boat air valve replacement spiral air plugs fits most inflatable boat, raft, rubber dinghy, etc.But not suit for netted ship .Putting an alternate inflatable boat valve at home will allow you to better handle the sudden situation of the need to replace the valve.