5 pieces of air pump check valve, enough for daily use and replacement; color: blue.
The pore diameter is 4 mm/0.16 inch, and the overall size is about 2 cm x 3.6 cm/0.79 inch x 1.42 inch, which is suitable for most fish tanks.
The valve is detachable, you can unscrew it to open it for easy cleaning and maintenance.
Made of high-quality plastic, strong and durable, not easy to break, to ensure long-term use.
Check valves can be used in ordinary aquarium air pumps to protect your air pump by preventing the aquarium water from siphoning in the event of a power outage.