Heavy Duty Doublewall is 48 ECT. Doublewall is two layers of cardboard. These boxes are stronger and offers more protection than standard boxes. Great for shipping heavy items.
Boxes can have a manufacture size variance +/- 1/4” on each side.
When assembled, these boxes measure Length x Width x Height. The Length is the horizontal distance on the
longest side. Width is the horizontal distance on the shortest side. Height is the vertical distance from top to
bottom when assembled.
These boxes have an ECT rating. For example, 48 ECT can withstand 48 pounds of pressure per inch width stacked
on the edge of the corrugated board.