Delivery is fast and almost always through Amazon. However, the cartridges are delivered in an envelope. This results in that the filter elements are flattened. The carton of Grünbeck missing entirely. It is therefore not that delivered what in the Beschraibung in the photo is displayed !!! Thus, for me is not comprehensible if it is correct to the SKU is. The filter cartridges are indeed in a Grünbeck film welded, but the origin is doubtful ....