The inflatable valve adapter will allow you to connect any standard electric pump, foot pump or compressor to the valve fitting, the standard car and bike tire valve. It works on most inflatable boards . It is also suitable for boats and kayaks which also use the valve for inflation. Use your compressor or tire pump to easily reach 20 psi. Be very careful not to over inflate your board or craft, and check the pressure of the board frequently. This is an adapter only. The speed at which your board inflates will depend on the pump used. Because tire compressors\/pumps take time to inflate, it is recommended to inflate the board with the hand pump until it becomes difficult to pump, then use the adapter to complete the pressure. br Remove your SUP valve cap and ensure the valve is sealed for inflation by turning the center pin to the out\/closed position. Insert the valve adapter into the SUP valve the same way you would insert the pump hose nozzle. Connect any standard pump to the valve adapter to inflate your board. Frequently monitor the pressure of the board during inflation. Size: 7.8 x 3.4 cm Delivery quantity: One piece