What is the difference between 200 lb. test boxes and 32 ECT boxes?

200 lb. test refers to bursting strength, while 32 ECT refers to stacking strength. Boxes that meet 200 lb. test will also exceed 32 ECT stacking strength.

  • Uline and UPS recommend 200 lb. test boxes, which provide more strength and protection than 32 ECT boxes – a budget-friendly alternative for lightweight shipments.
  • Uline 200 lb. test boxes are made with heavier paper and have 50% greater bursting strength than 32 ECT boxes.
  • Greater bursting strength means fewer crushed and damaged boxes during shipping.
  • 200 lb. test boxes perform more consistently.
  • Find the right box for you with the Uline Box Guide.
Bursting Test Stamp

Bursting Test

'Edge Crush Test (ECT) Stamp'

Edge Crush Test (ECT)

Uline Corrugated Box

Strength Guide

Box Type

Max Weight in Box

Over 1,700 box sizes in stock!

 		 
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