Justrite Document Storage Boxes and Tubes keep most manuals, MSDS sheets, Industrial Schematics or other important documents clean, safe and close at hand. Justrite Document storage boxes are made of tough weather resistant polyethylene that are rust and corrosion proof. Each document storage box has a smooth area to add your own labels for easy identification of contents or you may purchase optional label packs. Boxes are bright red in color and are easily spotted. The 23306 large document storage box and the 23305 round document storage tube are gasketed.