Extra Strength—For moderate use and higher stacking needs Medium-duty box offers 30% greater stacking strength than other brands and is for storage with or without shelving. Easy one step FastFold™ set up. The 35% deeper lift-off lid stays in place to secure box contents. Smooth rolled box edges add strength and help prevent paper cuts. A minimum of 59% post-consumer content. Inside dimensions listed below (w x h x d).