Features: The external carbon dioxide Refiner effectively filters water, providing clean and healthy water quality.<br> Use selected corrosion resistant stainlesssteel material, this Refiner maintain its shape even after extended use, ensuring durability.<br> Great for those who love keep fish, shrimp, and other creature, it create a great environment in their fishtanks.<br> Conveniently installed outside the Fishtanks, it space saving and is easy adjusting and maintain, ensuring a clean environment inside the Fishtanks.<br> Great for various water facility in petstores, it help maintain a balanced ecosystem and showcases quality fishtanks environment.<br> Specifications: Material: StainlessSteel<br> Style Option: 01(Small, 15cm)/02(Small, 20cm)/03(Medium, 15cm)/04(Medium, 20cm)<br> Product Size: As pictures shown<br> Package Includes: 1x Fishtanks External Refiner<br> note: Please allow 1-2cm errors due to manual measurement.<br> Due to the differences between different monitors, the picture may not reflect the actualcolor of the item.<br> 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. Sold by-Minnanxin