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Features:
1.【avoid Backflow】: 1-way non-return valve with anti-leakage and anti-backflow function prevents water from flowing back into the aquarium CO2 system.
2.【High Quality Aluminium Alloy】: The main body is made of aluminium alloy with CNC machining process, and the surface is sandblasted and anodized, which is not easy to rust.
3.【2-Way Locking Design】: The locks on both ends of the CO2 non-return valve fix the CO2 air tube to avoid it from falling off at high pressure.
4.【Compact Appearance】: Length is about 3.7cm, outer diameter is about 1.5cm.
5.【Simple Installation】: Connect the gas tube according to the arrow pointing to the direction of gas flow, 1 end connects to the inlet and the other end connects to the outlet tube.

Specifications:
Weight:17g
Colour: Grey
Material: Aluminium Alloy
Size: Length 3.7cm/1.5"; Outside Diameter 1.5cm/0.6"
Suitable for standard aquarium CO2 hose (inner diameter 4mm, outer diameter 6mm)

Package List:

1 x Check Valve

Notes:

1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.

2. Please allow 1-2cm slight dimension difference due to different manual measurement.