Feature:1. Fine Atomization: Aquarium air bubble stone can make the atomization more fine and make the air cleaning more efficient.2. Efficient Cleaning: Fish tank air bubble stone is good for keeping the fish tank clean and very easy to use.3. Oxygen Aeration: Aquarium air stone disc bubbler has high efficiency of oxygenation and can provide oxygen quickly.4. Easy To Clean: Air stone disc can be soaked in a small amount of citric acid and appropriate amount of water, then brushed and cleaned.5. Reusable: Aquarium air bubble stone can be used many times by cleaning it after using. It is made of stainless steel, durable.Specification:Item Type: Aquarium Air Bubble Stone Material: Stainless Steel Connectable Hose Diameter: Approx. 4mm / 0.16inApplicable Fish Tank: Less Than or Equal to 80cm / 31.5in.Package List:1 x Air Stone Disc 1 x Check Valve1 x Tube1 x Suction Cups1 x Adjustment SwitchNote:Manual measurement, please allow slight error.