specializes in all the essentials of aquarium accessories such as air pumps, air stones, sponge filters, fishing nets, cleaning brushes and other accessories to arrange your aquariums. Red one-way check valves Water backflow will always occur when the pump is turned off or the power source is interrupted. It will stop oxygen supplement and damage your air pump, water lover’s necessities. Made of durable plastic and fits most common aquarium air pumps, it can prevent water from siphoning and ensure smooth airflow. Essential for the most meticulous aeration setup in your aquariums. Only for oxygen systems Fits standard 0.5 cm tubing No airflow restriction Sturdy and aging resistant No air leakage or noise Packed with 10 pieces in total
