This aquarium air valve is designed to regulate the oxygen your fish tank, ensuring optimal conditions for your aquatic pets. Made from durable plastic, it features control mechanism that allows precise adjustment of air pressure. Ideal for use with air pumps, it enhances the efficiency of oxygen distribution in your aquarium. Features -Color:Light Grey -Material:Plastic -Size:4.30X3.50X1.00cm/1.69X1.38X0.39in -High oxygen efficiency: the oxygen pump provides ample oxygen, effectively increasing the oxygen content in the aquarium, ensuring the healthy growth of your fish -Adjustable airflow valve: equipped with an adjustable airflow valve, allowing you to regulate the oxygen pump's output to meet the needs of different aquariums -Cross shaped bubble adjustment: the unique cross shaped design allows easy adjustment of bubble size, creating beautiful bubble effects in your fish tank -Precision crafted: well crafted for durability and performance, ensuring use in your aquarium setup -Easy installation: designed for simplicity, this product can be quickly and easily installed without the need for professional skills Package list: 10 x Aquarium Control Valve