Bankers Box File Medium-Duty Storage Boxes with Lift-Off Lid, Letter, 4-Pack (0070109) Easy FastFold(TM) One Step Set-up saves assembly time Locking lift-off lid stays in place to secure box contents Smooth rolled box edges add strength and help prevent paper cuts Medium duty box with double bottom, double end, 1-1/2 side construction offers 30% greater stacking strength than other brands Dimension: 10" x 12" x 24"