String & Button File Storage Boxes

String & Button File Storage Boxes Top flaps on these boxes overlap and are closed by wrapping attached heavy-duty string around plastic eyelets. Boxes feature a write on area on two sides for labeling with content information. Strong crush resistant design for stacking up to 5 cartons high. FSB600 check size box is manufactured from 200# white corrugated. FSB640 letter and FSB680 legal size boxes are manufactured from 250# white corrugated. Sold in cases quantities.