[Widely used] Suitable for all aquariums, such as fish tanks, heavy duty professional water pumps, commercial air pumps, etc. [Easy to use] The air dispenser is connected to the air pump hose, and the flow of important air valves is manually controlled or the air pump is turned on or off. Suitable for 4mm air pump outlet or air hose. [High Quality] This aquarium airflow splitter is made of premium stainless steel, smooth surface, durable and sturdy, with long service life. [Shunt Gas] Oxygen aeration pump accessories can be used for shunt gas. It could transform the air flow from 8mm to 4mm. [Various Type] This stainless steel air control valve has several types, you can choose according to your needs.