Delaman® 2 PCS Check Valves CO2 Stainless Steel Non-Return for Aquarium Air Pump Fish Tank, Diameter 6mm
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Product description
- 1. The air pump and the DIY chemical reaction cylinder cannot be used.
- 2. Suitable for hoses with an inner diameter of 4mm.
- 3. This can only be used by the pressure of the steel cylinder. Air pumps, generators, DIY cylinders are useless.
- 4. Packing 2 stop valves
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