For Oxygen Pumps Only: Great check valve for most common aquarium air pumps. NOT suitable for CO2 or other high pressure systems to prevent cracks and leaks. Small and lightweight: Size: 2.1" L x 0.55" B; Air Hole Diameter: 0.12" ; Weight: 0.1oz. Standard air tube ID: 3/16’’. Add little weight to your hose to ensure smooth airflow. Ideal pump guards: Prevent water from flowing back through the hose during a power outage or pump break. Essential accessory for basic aeration in your aquariums. Robust and quiet: made of reliable plastic that can be firmly connected to the pipe without air leakage. Durable to withstand long time use without noise. Easy maintenance: clean the valve regularly. Please poke it from the intake side with a thin stick to open it if it is clogged inside and restricting airflow.
