Item Type: Fish Tank CO? Refiner_x000D_ Material: Aluminum Alloy_x000D_ Size:_x000D_ High: Approx. 6cm/2.4in_x000D_ Diameter: Approx. 24mm/0.9in_x000D_ Application: Fish Tank Carbon Dioxide Refiner 1Aluminum Alloy Material: Fish tank CO? refiner is made of high quality aluminum alloy as a whole, and the surface is nickel plated and will never rust. 2Prevent Slipping: The surface of the CO? refining machine has a knurled design, which has a good anti slip effect, and can be easily opened to clean and replace the refiner. 3Efficient: The squarium mini CO? refiner is clean and tidy. After entering the water, it complements the aquatic plants and has a good refining effect. 4Scope of Application: The fish tank CO? refining machine has a U shaped design, suitable for aquatic plants, fish tanks, aquariums, etc. 5Note: 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.Please allow some errors due to manual measurement.1 x Fish Tank CO? Refiner 1 x Suction Cup