Leinuosen 20 Pack Aquarium Air Pump Check Valves Plastic One Way Non-Return Check Valve Air Pump Accessories for Fish Tank Black
- Application: the check valve can be applied for common aquarium air pumps, protect you air pump by preventing aquarium water from back siphoning....
- Quality: made of quality plastic, durable and sturdy, not easy to break, ensure long time of usage.
- Practical design: the valves are detachable, you can unscrew to open it so as to clean and repair them easily.
- Measurement: the air hole diameter is 4 mm/ 0.16 inch, the overall length is approx. 4.2 cm/ 1.7 inches, proper size for most fish tank.
- Package contents: 20 pieces air pump check valves, sufficient for daily using and replacement.