Feature:1. UNIFORM AIR OUTPUT: Atomizing aquarium bubble disk with high density and fine oxygen output, super micro nano, uniform air output.2. HIGH DISSOLVED OXYGEN: Fish tank nano air disc is high dissolved oxygen, ensure the oxygen content in the fish tank, ensure the fish have enough oxygen to breathe.3. EASY TO CLEAN: Aquarium nano bubble disc is easy to clean and can be used many times for a long time. Regular cleaning can avoid clogging.4. SAFE MATERIAL: Aquarium nano air disc is made by high temperature sintering of safe material, which will not cause any impact on the environment of the fish tank.5. SPACE SAVING: Fish tank nano bubble disc is compact and does not take up too much space, making it suitable for most aquariums and fish tanks.Specification:Item Type: Aquarium Nano Air DiscMaterial: PlasticApplicable Fish Tank Size: Approx. 50-120cm / 19.7-47.2in.Package List:1 xAquarium Nano Air Disc1 x Check Valve1 x Suction Cup1 x Control ValveNote:Please allow some error due to manual measurement.