Extra-strength, divider storage box is built for moderate use. Ideal for stacking without shelving. Stacking weight is 650 lb. Each storage box includes three 5" corrugated dividers to keep your letter-size files upright even when the box is partially full. Design features double-bottom, double-end, 1-1/2" side construction for use with or without shelving. FastFold one-step setup makes box assembly fast and easy. Deep, liftoff locking lid stays in place to secure box contents. Each box contains a high percentage of recycled material.