Ulrich D or A1 size, 36″ x 24″, Flat File Cabinet Folder for organizing Maps and Plans. Ulrich Flat File Folders are perfect to organize any flat file cabinet. They no only organize your flat file cabinet they are the best way to keep your Maps or Plans filed flat, without curling or tearing. In addition the folder can be removed from the flat file cabinet and taken to your meeting or worksite with ease. If you have flat file cabinets you will want the Ulrich Flat file Cabinet Folders.