Feature: 1. The air output is fine and the dissolution rate is high, more practical. 2. The main body made of imported fine workmanship acrylic material, glittering and translucent, dazzling and eye-catching. 3. Refiner using the excellent nano MBKT technology manufacturing, bring good refinement effect. 4. With independent bubble counting function at the same time, perfect combination with refining. 5. Red chip need less pressure, especially easy to outlet air, saving more materials. Specification: Condition: 100% Brand New Item Type: Aquarium Refiner Material: Acrylic Color: As Pictures Shown Optional Size: L-24, M-17, S-13 L Suitable Aquarium: Approx. 120-150cm/47.24-59.06inchM Suitable Aquarium: Approx. 80-100cm/31.50-39.37inch S Suitable Aquarium: Approx. 40-60cm/15.75-23.62inch . Package List: 1 x Aquarium Refiner 1 x Suction Cup Note: If there are large bubbles, it may be that the CO2 diffuser slice has not been fully immersed, and there will be no large bubbles after being placed in water for more than 2 hours. You can soak the CO2 diffuser slice for 2 hours before use.