Product description: Size: length 6cm Refining beaker diameter 24mm Color: silver Material: aluminum alloy Package includes: 1 refiner Description: Sturdy Material - Made of sturdy aluminum alloy, strong, rustproof, anti-corrosion, safe, environmentally friendly and durable. Fine Bubbles - It makes small and fine bubbles and the gas bubbles are also well and finely distributed in the water. Create a healthy environment for your fish where they can breathe freely and grow up happily Quiet operation - Quiet operation, quiet, no hissing, whistling or other noises to be heard. Easy to Install - With suction cup, easy to attach and does not take up much space, does not reduce fish habitat. Easy to install and also easy to dismantle and clean. Widely used - Fits well in most pools under 1.5m. The difference for different pool sizes is: E.g. for a 60L tank it makes 20 bubbles every second, for a 90L tank it makes 30-35 bubbles every second, and for a 350L it makes about 60 bubbles every second. the larger the basin, the more vesicles it makes. Better to adapt to the needs of fish