Medium-duty divider storage box is built for heavy daily usage and maximum stackability. Ideal for stacking without shelving. Storage box includes corrugated dividers that provide five compartments to prevent letter-size files from falling over within the box. Features 30 percent greater strength than other brands plus double bottom, strong panel support, double end, 1-1/2" side construction for use with or without shelving. FastFold one-step setup makes box assembly fast and easy. The 35 percent deeper liftoff, locking lid stays in place to secure box contents. Smooth rolled box edges add strength and help prevent paper cuts.