These super heavy-duty packing boxes are manufactured from 350# / 51ECT doublewall corrugated.

• Optional partition kit includes: 3 sets of partitions and 2 layer pads (sold separately).
• Special "Skip Slot Tabs" hold flaps down and out of the way to make packing easier.
• Each box is printed with fragile warning and this side up arrows and feature convenient check boxes for In-House room destination instructions.
• Boxes feature hinged hand holes that makes them easier to carry.
• Sold and shipped flat in bundle quantities.