• rubber & brass
• Boat adapter:fit for inflatable boat, kayak, , paddle sup board, etc,pump adapter
• Air 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,pump adapter
• Sup pump adaptor:bike pump or compressor and inflate to the recommended psi,pump adapter
• Air pump adapter:sup electric pump adaptor utilizes a standard schrader fitting to couple with an air compressor or bike/tire pump,pump adapter
• Pump 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 adapter