Aquarium Non-Return Check Valve Doors & Door Hardware Wide Application: The shape contour

Wide Application: The shape contour duplications gauge fits for measuring many irregular items

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Aquarium Non-Return Check Valve Doors & Door Hardware Wide Application: The shape contourDescription: Flood Prevention: Designed for aquariums, our non return check valves act as a shield against potential flooding, offering a safe environment for your aquatic friends. Reliable Material: Made of high quality plastic material, not easy to aging, sturdy and durable. Size: 5. 3 x 1. 35cm. Diameter of air holes: 4mm. One Way Airflow: Our valves ensure a unidirectional flow, allowing air to move from the pump to the aquarium, eliminating the