For Oxygen Pumps Only: One-way check valve for most common aquarium air pumps. Not suitable for CO2 or other high pressure systems to prevent ruptures and leaks. Small and light: size: 5.4L x 1.4W (cm); vent hole diameter: 0.3cm; weight : 3g. Standard inside diameter of the trachea: 0.5cm. Add some weight to the hose for smooth airflow. Ideal Pump Protection: Prevents water from flowing back into the hoses during power outages or pump damage. Essential accessory for basic aeration setup in your aquarium. Sturdy and Quiet: Made of reliable plastic, it can be tightly connected to the pipe without air leakage. Durable and can be used for a long time without making noise. Easy maintenance: Regular cleaning of the valve. When the interior is blocked and restricts the airflow, push it with a thin stick from the side of the entrance to open it. Scope of delivery: 100 check valves, red
