Archival Methods Document Letter Box 5" 10-3/8 x 12.25 x 5" Black Document boxes feature an undercut front panel for safe insertion or removal of documents and fast and convenient file search without removing the documents or file folders. Embossed labeling areas on box end and lid front neatly, accurately and consistently position a standard pressure-sensitive (PSA) identification label. Boxes have pull cords for easy box withdrawal on closely stacked shelves. Made of heavyweight Archival Grade boxboard. Metal edge clamps are corrosion treated in black polyester coating with wax-free polyester finish on the blind side.