The check valves are for common aquarium air pumps. Please DO NOT use them with CO2 system.

Place in your airline tubing between your air pump and aquarium water to prevent water returning down the airline.
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The check valves are for common aquarium air pumps. Please DO NOT use them with CO2 system.

Place in your airline tubing between your air pump and aquarium water to prevent water returning down the airline.
Be attention:
Please DO NOT use them with CO2 system.

Made of durable clear plastic. Package Weight: 0.89 oz / 25 g

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