Made of ABS material, this is a practical Fish Tank Air Control-valve. For connection to standard aquarium oxygen . They will not melt or break to pollute the water. It suitable for most tubes. Just insert the connector directly into the air , very easy to install. The 4-heads fish tank air valve aquaculture is durable, doing no harm to your fish tank and your aquarium pets, can be applied for a long time. Features -Color:Sky-blue -Material:ABS -Size:10.00X4.70X2.00cm/3.93X1.85X0.79in -Provides an efficient supply of oxygen to fish tanks, ensuring a healthy and thriving aquatic environment. -The four-head design of the oxygen pump allows for ample of oxygen to all areas of the tank, promoting optimal oxygenation for fish and aquatic plants. -Equipped with a practical splitter valve, this oxygen pump allows for easy and effective division of airflow, ensuring that each area of the tank receives the appropriate amount of oxygen. -Suitable for a wide range of fish and aquatic plants, this oxygen pump promotes growth and development, helping to create a vibrant and thriving underwater ecosystem. -With its durable construction, this oxygen pump is a reliable and addition to any fish tank or aquarium setup. Package list: 4 x aquarium pump