I can only agree with most of the previous speakers. The 50 cases are very good and tight working, even with clips for a booklet, qualitatively better than many other cases that you get in professional markets. Even repeated opening brings no wear on the casing. The film to slide the cover is a bit thin but adequate. Finally, you will also not use this so often. The retailer delivered quickly and very well packed in a cardboard box with adequate Auspolsterung.Der cardboard was fixed and therefore not as susceptible to damage in transit right. The price-performance ratio for 50 cases of this type is excellent. In stores you usually only get 5 Series packs a particular brand, you would extrapolate the price, you would come up with much higher costs. I am completely satisfied!