Inflatable boat air valve adaptor: This electric pump adaptor utilizes a standard valve fitting to couple with an air compressor or bike/tire pump. Easy to use: With the valve in the closed position, insert the valve fitting and rotate to lock in place. Remove the cap on the fitting, and connect a standard electric pump, bike pump or compressor Easy conversion, fast inflation: You can let the ordinary inflation tube directly connect to the paddle and complete the inflation in 5-10 minutes High quailty: Made of copper + rubber material, high flexibility, high strength Package included: 1* Pump adapter Note: Please allow minor error due to manual measurement. The colors may be a little difference for the different monitor display. Specification: Color: Black, orange Size: 3.4*7.8cm/1.3*3inch Suitable for: Various kayaking Package List: 1* Pump adapter