Well, it's going so well
A UFO fan from the "ecs" brand was installed on our ship. The plexiglass cover was yellowish and brittle. Since I couldn't find any more fans from ecs, I tried this product and the fan from Talamex as a replacement. This fan is from "AAA" and made a slightly better impression than the product from Talamex. Basically, the products from "AAA" and "Talamex" were identical.
However, the stainless steel cover is extremely thin at 0.49 mm compared to the 1.2 mm of the ecs fan. The holes also don't fit 100%. I therefore combined the white plastic part and the plexiglass cover from the new "AAA" fan with the old stainless steel cover of the "ecs" fan.
The cutout in the ecs cover was a few mm larger.
Conclusion: I was able to repair my old ecs fans with it. For a new installation, I would choose a different, higher quality product.