Can be used as a carbon dioxide regulating connector for aquariums or fish tanks This accessory will enable two types of carbon dioxide products to run from a carbon dioxide tanks Easy Installation: With the CO2 Refill Adapter, You can fill CO2 cartridges simply yourself by connecting a commercial CO2 bottle with your CO2 cylinde with quick connecting It is none longer necessary to exchange your empty CO2 cylinders, none Complicated towing with our Simply connecting the separator to your carbon dioxide tanks and connecting 2 hoses to your product to use, Manufacturer: FROMCEO