Cubed, fixed-depth design simplifies packing and moving. Sturdy and economical, these boxes feature heavy-duty ECT-32-C Flute 200-lb test corrugated Kraft construction. Shipped flat, they assemble easily with shipping tape (sold separately). Box/Tube: Shipping Box; Box/Tube Design: Regular Slotted Container (RSC); Size Type: X-Large; Length: 12".