EXTENDABLE SORTER: This accordion sorter has a gigantic storage capacity, it is expandable, it's great space saving for your office. You can store a lot of documents like small notebooks, your taxes, receipts rent, mutual etc... EFFICIENT and SOLID: Document Sorter is very practical for quickly accessing your current files. The plastic quality, it is stronger than the same cardboard tools that fear water and time. 13 POSITIONS WITH ALPHABETICAL LABEL: This bellows sorter can quickly classify the papers without piling them in a corner at the risk of misplacing them, matched with the alphabetical labels, which is easy to find the files at a glance. A4 SIZE: This paper sorter is in A4 size, which is suitable for most administrative and school documents, it will become the best helper in office and school life.