Bankers Box Stor/File Medium-Duty Storage Boxes with String & Button, Letter, 12 Pack (00704)

String & button closure keeps contents secure even if box is overturned.
Fast fold quick and easy assembly.
Medium-duty stacking strength for use with or without Shelving.
Medium duty box with double bottom, double end and 1-1/2 side construction
This box offers 30% greater stacking strength than other brands and is ideal for storage with or without shelving.
Locking lift-off lid stays in place to secure box contents.
Smooth rolled box edges add strength and help prevent paper cuts.