1,Aluminum Alloy Material: Fish tank CO₂ refiner is made of high quality aluminum alloy as a whole, and the surface is nickel plated and will never rust. 2,Prevent Slipping: The surface of the CO₂ refining machine has a knurled design, which has a good anti slip effect, and can be easily opened to clean and replace the refiner. 3,Efficient: The squarium mini CO₂ refiner is clean and tidy. After entering the water, it complements the aquatic plants and has a good refining effect. 4,Scope of Application: The fish tank CO₂ refining machine has a U shaped design, suitable for aquatic plants, fish tanks, aquariums, etc. 5,Note: When the refiner is used in water, there will be large bubbles at the beginning of use, and it will be normal after a few hours of use. 1 x Fish Tank CO₂ Refiner1 x Suction Cup Item Type: Fish Tank CO₂ RefinerMaterial: Aluminum AlloySize:High: Approx. 6cm or 2.4inDiameter: Approx. 24mm or 0.9inApplication: Fish Tank Carbon Dioxide Refiner Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.