10 pcs. Aquarium CO2 non-return valve for air hose

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  Good non-return valves  

  10 pcs. Aquarium CO2 non-return valve for air hose (Misc.)

  After seeing the Aquaristikgeschäft as expensive but such check valves are, I thought I'll see on Amazon, if I can save some there! Here cost 10 check valves not even as much as 2 pieces from the Aquaristikgeschäft! Well, I thought perhaps the proces
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  Partially OK?  

  10 pcs. Aquarium CO2 non-return valve for air hose (Misc.)

  The price of non-return valves had led me to buy what it reminded me in retrospect again, the love of money is not always horny. Of the 10 valves I could discard a same because it was totally jammed. The other nine were working as far, but they were,
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