• rubber & brass
• Air pump adapter:because /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 off the pressure,sup pump adaptor
• Air adapter:with the in the closed position, insert the schrader fitting and rotate to lock in place. remove the on the fitting, and connect a standard electric pump,air pump adapter
• Pump adapter:sup electric pump adaptor utilizes a standard schrader fitting to couple with an air compressor or bike/tire pump,air pump adapter
• Sup pump adaptor:bike pump or compressor and inflate to the recommended psi,air pump adapter
• Boat adapter:fit for inflatable boat, kayak, , paddle sup board, etc,air pump adapter