Divider storage box is built for heavy use and frequent access. Ideal for stacking without shelving. Stacking weight is 850 lb. Heavy-duty box includes three 5" corrugated dividers to keep files upright even when the box is partially full of your letter-size files. Design features double-bottom, double-side, triple-end construction. FastFold one-step setup makes box assembly fast and easy. Deep liftoff, locking lid stays in place to secure box contents. Reinforced, tear-resistant hand holes make box comfortable to carry. Box contains a high percentage of recycled material.