Made of high class plastic material, this is -shaped Fish Tank -valve. For connection to standard aquarium oxygen . They will not melt or break to pollute the water or block the horse. It suitable for most tubes. Just insert the connector directly into the air , very easy to install. The fish tank air pump aquaculture is . Features - ColorAssorted Color -Material:Plastic - Size: 3.80X2.00X0.80cm/1.49X0.79X0.31in -The excellent workmanship of our product will bring you a . -You can use this item to adjust the oxygen's speeds of inlet and outlet to the fish tank. -This t shaped valve is used to control the oxygen in the indoor aquariums and fish tanks. -High-class material and simple operation ensure this valve can be working performance. -The installation is simple and fast, very convenient and practical for you to use. Package list: 30 x air valves