1. Universal Compatibility: The flow control valve meets your needs —whether you're looking for a 12mm valve for a 0.5inch inner diameter hose or a 16mm valve for a 16mm inner diameter. Achieve precise control for the ideal aquarium experience. 2. Enhanced Durability: Our aquarium flow control valve is made of durable PP material, ensuring it is rustproof and corrosionresistant. The polished surfaces make it comfortable to handle without harming your hands. 3. Effortless Use: Our aquarium flow control valve makes cleaning a breeze. Easily disconnect the tank from the filter by simply closing both valves and switching the plug to the open position. Enjoy a hassle cleaning experience. 4. Wide Applications: Do it all with our aquarium flow control valve. Not only is it for aquarium water flow, but it also works as a quickrelease valve for filters, pump returns, or overflow setups. Suitable for both freshwater and saltwater systems.