Leinuosen 20 pack aquarium air pump check valves plastic one way non-return check valve air pump accessories for fish tank, black

Features:
Application:
The check valve can be applied for common aquarium air pumps, protect you air pump by preventing aquarium water from back siphoning during a power outage.

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.

Specifications:
Overall length: approx. 4.2 cm/ 1.7 inches
Air hole diameter: 4 mm/ 0.16 inch
Color: black

Package includes:
20 x Air pump check valves

Note:
Manual measurement, please allow slight errors on sizes.