Check Valve Anti-Backflow for Aquarium Air Pump Suitable for 4mm I.D. Hose

Description

Check Valve Anti-Backflow for Aquarium Air Pump Suitable for 4mm I.D. Hose
Features: Great one way check valve for aquarium and fish tank.
Protect you air pump by preventing aquarium water from back siphoning during a power outage.
Detachable design makes it easier for you to clean and repair.
Unscrew to open it.
Efficient, effective protection for your pump.
Specifications: Material: Plastic
Length: app.4.3cm/1.69in
Color: Black + Transparent
Package Includes: 1 x Air Check Valve (without retail package)
note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!