One of the best erasers you can find in Greece, mainly because it is soft and does not damage the "tooth" of the paper (very important for sketching/drawing) but also due to its performance, as it erases better and faster than any other (except for Sakura Sumo grip, Kokuyo, and other Japanese ones that are not available in Greece). The Faber Castell 18 71 20 is by far the best in quality and performance compared to any other Faber Castell product. If you order from abroad, there are others that are equally good but better in performance. (Tombow MONO Plastic, for example, is top-notch).
As for kneaded erasers for those who do freehand sketching, the best is from LYRA. (Better than Faber Castell and the only product that LYRA produces better since it can hold its shape better when you make it pointed or flat thin, whether to erase details or to create effects, highlights, etc.). This is not a personal opinion, but a fact of everything I have written. For all the years I have been using them daily (except for the Sumo grip, because I can't find it easily), they have not changed in quality and performance.
I have been working with them and testing them in every detail for decades now. What I write is all 100% facts and not just my opinion. I have filled pages with performance tests to the point where I even check the paper with 10x magnification to see if the eraser I am testing damages the tooth.