Features: Precise engineered CO2 regulator with detachable bubble counter ensures accurate gas flows control for better water plant growth in freshwater aquariums. Corrosion resistant metal construction and easily disassembly design enable low maintenance while maintaining consistent CO2 delivery. Great for aquariums enthusiasts and water plant hobbyists searching reliable CO2 management solution for plant freshwater tanks. Enhances water plant ecosystems by providing stable CO2 dispersion in homes or professional aquariums setups with underwater vegetation. Upgraded installation process through standardized fittings accommodates various systems while preventing gas leaks in humid environment. Specifications: Component: Metal, Acrylic Product Dimension: Approx. length 11.8cm/4.64inch, Inlet and outlet diameter: 6mm/0.23inch Water Capacity: 3~4ml Package Includes: 1 Set aquariums CO2 Atomizer System note: Please allow 1-2cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.