Aquarium Valves are manufactured with premium plastic material for and use. Great tool for the fish tank or aquarium. With the help of this adjusting-valve, you can control the air inflow and the fish will live in a comfortable environment. Easy installation, just insert the connector directly into the air . Professional and practical, very convenient. Fish tank adjusting let you operate it easily. Features - ColorAssorted Color -Material:Plastic - Size: 3.80X2.00X0.80cm/1.49X0.79X0.31in -Control vital from your pond aerator or aquarium air pump with this handy air controling-valve. -Professional and wear resistant, this is very convenient and practical. air flow regulating valve/adjustable and water volume. -This air pump control-valve is suitable for different sizes of aquariums and fish tanks. The volume of air can be adjusted. -Lightweight and portable design, portable to carry to anywhere you need. The interface is concave and convex, and the is firmly connected. -This is easy and convenient to operate, and easy to store when you are not in use. Suitable for all kinds of aquatic market, family bathtub, aquarium use. Package list: 30 x air valves