1. You can control the airflow by switching the valves on or off. 2. Made of high quality stainless steel, it is durable and not easy to rust, which is very suitable for aquariums. 3. Multiple outlets allow you to adjust the airflow for multi-fish tanks. 4. The distributor can be used for aquarium, hatchery and aquaculture applications. 5. Easy to use and suitable for most aquarium users. Item Type: Aquarium Air Flow Control Distributor. Feature: Ways: 10 Color: Silver Material: Stainless Steel Size: About 192mm Package Contents: 1 x Aquarium Air Flow Distributor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.