Not what I expected; Durability doubtful

Unfortunately, not the product, what I expected / hoped for.
The decoupler are namely no rubber / hard plastic plug (ie two parts for plugging), but of pure, elastic solid rubber in one piece.
To attach therefore NEAT traction is needed to get the broad support lugs through narrow openings. First, you simply only fear that the thing she tears apart directly but are more robust than one might think at first. After that, the question arises, how much would fix and then release the "baggy rubber" survive well.
When affected housing the screw holes for the fan are something sharp, with the result that 25% of the rubber nipples were already damaged when first attaching and hold no longer as great as it would be undamaged the case. Whether they would ever create a second use or even survive the re-pulling I have doubts.

This product is not suitable for me. Stability and durability not given for my purposes.
For hobbyists who swap times more often than every 2-3 years a fan in the housing or even expand to tidy up short, I can no recommendation from my side. The price I find still too high for the delivered result.
A few days later I have also fixed in another PC with a fan decouplers and here had the opposite problem: the screw holes for the fan are a bit too big, so that the liner does not fit perfectly and threaten relatively easy to slip out.

2 stars I forgive only because the gums, if they sit halfway without prejudice to the right place really decouple, super vibration.
Otherwise, for me, the regularly dismantled its PCs for basic cleaning or fan exchanges, but unfortunately totally unsuitable.