【Applicability】 The input side of this aquarium air distributor fits hoses with an inner diameter of 8 mm. The output side is suitable for hoses with an inner diameter of 4 mm. 3 types available: 2-way = 4.95 cm. 4-way = 7.7 cm. 6-way = 11.5 cm/4.5 inches. 【Flow Control】 The aquarium hose splitter helps you divert the aquarium; equipped with a flow control valve for precise regulation of air flow, simple and convenient to use. Stainless steel material: The aquarium air distributor is made of high-quality stainless steel, sturdy and durable, not easy to rust; polished surface, beautiful appearance, smoothly polished connections, no leakage, long service life. Wide range of applications: This aquarium air distributor is widely used in aquariums, aquaculture, commercial oxygen pumps, etc. The air lever valve can be connected to the aquarium hose. A practical accessory for oxygen pump. 【Easy to Use】 Our stainless steel aquarium air pump accessory is equipped with a flow control valve that precisely regulates the air flow and is easy to use.