Product material: plastic material, not easy to age.
Package includes: 20 air pump check valves.
Product features: durable, long-term use will not produce noise.
Product design: The valve is detachable, can be unscrewed to open the valve, easy cleaning and repair.
Product use: check valve can be used for ordinary aquarium air pump, to prevent aquarium water siphon resistant in the event of power failure, protect air pump, suitable for most fish tanks.
