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What is the difference between 200# Test boxes and 32 ECT boxes?


Both 200# and 32 ECT are measurements for the "strength" of a box. Uline recommends 200# Test boxes, because they are stronger and survive the punishment of shipping better than 32 ECT boxes.

  • 200# Test boxes have a "Bursting Strength" of at least 200 pounds per square inch.
  • 32 ECT (Edge Crush Test) boxes may only have a "Bursting Strength" of 130 to 190 pounds per square inch.
UPS Strength Guidelines

Look at the "Box Certificate" seal to check what you have:


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11/26/2015 08:47:42 PM- - USWEB5- 0- 0/0.0-