2 Choices: The 12mm valve is suitable for filter body inlet and outlet pipes with an inner diameter of 16mm and an outer diameter of 22mm; The 16mm valve is suitable for filter body inlet and outlet pipes with an inner diameter of 12mm and an outer diameter of 16mm Adjustable air tube connector: Aquaculture This plastic aquarium air pump is T-shaped design, you can control the oxygen volume by rotating the valve, so as to match the water environment for your aquarium Function: It can be used to change water quantitatively every time, and can also be used to add water Wide application: It is suitable for changing water from various filter barrels. It is recommended to install on the outlet pipe.
