Product Material: Copper + RubberSize: about 8cm in length, about 3.5cm in diameter, error of about 1cmQuantity: 1pcsPackage content: 1*SUP paddle nozzle1.Inflatable SUP Pump Adaptor:No special air pump is needed, the conversion head can connect the ordinary inflation tube to the paddle. Widely applicable to all kinds of paddle boards, canoes, rubber boats, assault boats, flushing pools, floating rows, inflatable beds, kayaks.2.High Quality MaterialMade from high strength hard plastic and alloy, solid structure and saving labor, strong seal and anti-leakage.3.Easy To Use With the valve in the closed position, insert the Schrader valve fitting and rotate to lock in place. Remove the cap on the fitting, and connect a standard electric pump.4.Easy Conversion & Quick InflationThis air valve adapter is easy to conversion, and has high efficiency inflation.Use your car or bike tire inflator to easily reach recommended PSI within 50min, the larger the inflation pump or compressor you use, the faster the inflation.5.AttentionAs the compressors/tire pumps take time to inflate, it is recommended to inflate the board by hand until it becomes difficult to pump, and then use the adaptor to top off the pressure.