Product Description: Item Type:Aquarium Air Flow Control Distributor Ways:2/4/6/8/10/12 Material:Stainless Steel Diameter(inlet):8mm,4mm Features: 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 distributor Notes: 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"