12 perbox strenggth 510lbs sturdy construction Save assembly time with this light-duty box. Sturdy corrugated construction for strength and value. String-and-button tie closure securely stores box contents. Item Specifications Brand Universal Global Product Type File Boxes-Storage Box Type Easy Assembly Material(s) Corrugated Fiberboard Strength Medium-Duty File Size Format Letter Inner Width 12" Inner Depth 24" Inner Height 10" Closure String and Button Stacking Strength 510 lbs Color(s) White