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Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes

ECT-44 | 275 Lbs Test Burst Strength

Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes Features

Heavy-duty construction provides greater protection and stacking strength.

  • Manufactured from heavy-duty 275#/ECT-44 single wall kraft corrugated.
  • These cartons are 40% stronger than standard shipping containers.
  • Sold and shipped flat in bundle quantities.


Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes are highly diverse and come in a wide range of shapes and sizes. The reinforced ECT-44 and 275# ratings make these some of the best boxes to use for any product that needs strong, secure, and reliable packaging. Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes are up to 40% stronger than the industry standard box, for when the job needs to be done well with no compromises. All corrugated boxes ship and store flat to save space.

Are we missing the specification you need? Please go to our Contact Us page and submit your question to us, or call 1-877-284-7760

Dimensions are indicative of  the box’s internal dimensions.

275# is a classification derived from the Mullen Test of a box’s bursting strength. A 275# rating means 275 pounds of force per square inch are required to break through the side of the box. ECT-44 is a classification derived from an Edge Crush Test of a box’s stacking strength. Single layer “Heavy Duty” corrugated cardboard boxes have a minimum rating of 275# and ECT-44. They may be stronger than the minimum subject to individual and random variation. The recommended loading limit per carton is 95 pounds.

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Have a question that is not answered here? Please go to our Contact Us page and submit your question to us.


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Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes are highly diverse and come in a wide range of shapes and sizes. The reinforced ECT-44 and 275# ratings make these some of the best boxes to use for any product that needs strong, secure, and reliable packaging. Pack Kontrol® Heavy Duty Single Wall Corrugated Boxes are up to 40% stronger than the industry standard box, for when the job needs to be done well with no compromises. All corrugated boxes ship and store flat to save space.

Product Specifications

Are we missing the specification you need? Please go to our Contact Us page and submit your question to us, or call 1-877-284-7760

Dimensions are indicative of  the box’s internal dimensions.

275# is a classification derived from the Mullen Test of a box’s bursting strength. A 275# rating means 275 pounds of force per square inch are required to break through the side of the box. ECT-44 is a classification derived from an Edge Crush Test of a box’s stacking strength. Single layer “Heavy Duty” corrugated cardboard boxes have a minimum rating of 275# and ECT-44. They may be stronger than the minimum subject to individual and random variation. The recommended loading limit per carton is 95 pounds.

Click the image below to enlarge it.

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Have a question that is not answered here? Please go to our Contact Us page and submit your question to us.


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