For oxygen pumps only: Great non-return valve for the most common aquarium air pumps. NOT suitable for CO2 or other high pressure systems to avoid cracks and leaks. Small and Light: Size: 2.1"L x 0.55"W; Air Hole Diameter: 0.12"; Weight: 0.1 oz. Standard ID Airline Hoses: 3/16"". Add little weight to your hose to ensure smooth airflow. < p>Ideal Pump Protections: Prevent water from flowing back through the hose during a power outage or pump pause Essential accessory for basic aeration in your aquariums. Sturdy and Quiet: Made of reliable plastic that resists air leakage can be connected to the hose tightly.Durable to endure a long time use without noise. Easy maintenance: Clean the valve regularly.Please poke it from the inlet side with a thin stick to close it open if it is clogged inside and restricting airflow.
