Air Stone Bubble Bar-Bubble dispensed equally and oxygen supply is excellent, more practical. The Oxygen Diffuser Tube is porous plastic hose with good softness,and any shapes required can be established. Fish Tank Oxygen Diffuser Tube--Air out uniform, as beautiful as the water curtain, strong and beautiful ornamental value. Not easy to block, easy to clean, easy to take care of, take no time or worry. Perfect accessories for your fish tank, using with oxygen pump, oxygenate effect for aquarium fishtank.