The Oral-B Nozzle Oxyjet Brush Head is perfect for Oral-B Oxyjet irrigator that cleans below the gum-line. The Oxyjet infuses water with micro-bubbles and streams them to attack plaque bacteria below the gum- line. It is compatible with all Oral-B irrigators. It gently removes food particles from hard-to-reach areas. The specially designed air filter cleans the air that enriches the water on its way to the nozzle.