Product Description:Item Type:Aquarium Air Flow Control DistributorWays:2/4/6/8/10/12Material:Stainless SteelDiameter(inlet):8mm,4mmFeatures:1. You can control the air flow by switching or turning off the valves.2. Made of high-quality stainless steel, it is not easy to rust, which is very suitable for aquarium.3. Multi-outlets allow you to adjust the air flow for multi-fish tanks.4. This distributor can be used for aquarium, hatchery and aquaculture applications.5. Easy to operate and suitable for most aquarium users.Package Include:1 x aquarium air flow distributorNotes:1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors.2. Due to the screen difference, the color may be a little different from what you expect, please allow it.3. 1.00cm=0.39"