The high-quality eraser and sharpener boxes of the Sleeve and Sleeve Mini models disappear after use in a red, blue or black sleeve, which not only protects against dirt, but also allows precise guidance of the eraser stroke when open, or serves as a practical waste container in the case of the sharpener. in the case of the sharpener, it serves as a practical waste container - the sleeve has already received an award for its ergonomics and user-friendliness - the ISPA Award 2007 in the category "Back to School". Further proof that even such simple things as erasers and sharpeners can always be improved - true to the Faber-Castell motto: making the ordinary exceptionally good.