vertical seam where cardboard is wrapped and glued is not the greatest quality control. it's only about a 1 1/2" overlap and the top is missing glue; I want to use them for nuts and bolts, NOT overload, so I taped a piece of cardboard 5" wide x 4" tall in the corner where the Overlapping takes place so my cardboard will overlap them and reinforce it much better.I don't have to do this although the glue should be sufficient and overlap.The cardboard itself has good strength for a box of this size.
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