Hao Pro 8Inch Length Air Stone Bar Provide Aeration Equal Bubbles Distribution Mineral Bubble Diffuser Airstones Multi Function Green 2 Pieces For Hydroponics Aquarium Tank Air Pump

Material:High quality mineral and plastic Size:Diameter 8inch(20.5cm) Recommended pump power: 2W-4W Package Include:2 pieces air rock These air rocks can provide aeration into your aquarium when connected to your air pump.Air flow in the tank directly helps with the oxygen levelscontrol aquatium air pumps airflow easily and efficiently with them!