Features: Brand new and high quality Using this separators, you can connect multiple CO2 diffusers/devices from a single CO2 gas-cylinder. Each outlet is equipped with a separate needle valve, which can accurately adjust the CO2 flow rate. Simple to set-up, no need to modify the carbon dioxide regulator. Used in carbon dioxide storage tanks. Good for aquarium plant. Provides the convenience in distributing air flows up to 2-6 different tanks. Specifications: Material:Aluminum Type:W0202/W0203/W0204/W0206 W0202:Approx.10x7.5cm/3.93x2.95inches W0203:Approx.9.5x7.5cm/3.74x2.95inches W0204:Approx.10x9.5cm/3.93x3.74inches W0206:Approx.10x9.5cm/3.93x3.74inches Package Includes: 1x Aquarium CO2 Splitter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.