0.5L Diving Oxygen Tank Scuba Respirator Refill Adapter
High pressure pump is easy and quick to fill the 0.5L air tank in 7-10 minutes, and the filled 0.5L oxygen cylinder allows you to stay underwater(no deeper than 10 meters) for about 5-10 minutes. And you can also fill the 0.5L tank from larger air cylinder by the provided adapter. Great equipment for diving entertainment, practice or training.