Feature:1. Premium Material: CO2 diffuser uses high temperature sintered white corundum sand, which is more durable, has excellent air permeability, and is not damaged for a long time.2. Double Suction Cup Fixation: Aquarium CO2 diffuser is fixed with double suction cups, which is not easy to fall off and is strong and durable.3. Space Saving, Transparent Appearance: CO2 diffuser is delicate and compact, does not occupy the space of the fish tank; The whole body is transparent, and it can be integrated with aquatic plants.4. Thickened L Shaped Intake Pipe: The fish tank CO2 diffuser features a 6.8cm/1.0in long thickened intake pipe for durability.5. Adjustable Air Volume: CO2 diffuser presents a regulating valve, small air volume, fine bubbles, forming a "atomization" effect; Large air volume, full of bubbles, high dissolved oxygen.6. High Dissolved Oxygen, Ultra Quiet: High dissolved oxygen content, avoid splashing, very little vibration to the water body, less than 20 decibel operation. CO2 diffuserSpecification:Item Type: CO2 DiffuserMaterial: AcrylicSize:Total Length: Approx. 7.2cm/2.8inHeight: Approx. 2.7cm/1.1inDiameter: Approx. 6.5cm/2.6inTrachea Diameter: Approx. 4mm/0.16inTotal Trachea Height: Approx. 6.8cm/2.7inSuction Cup Diameter: Approx. 2.5cm/1.0in.Package List:1 xCO2 Diffuser1 x Regulating Valve2 x Suction CupNote:Please allow some error in manual measurement.