Twice the protection of a standard carton.Heavy duty construction provides greater protection and stacking strength. Cartons are sold in bundle quantities and ship flat to save on storage space and shipping. 275# Double-wall/ECT-48 (Edge Crush Test) - holds up to 100 lbs. Heavy-Duty boxes provide added protection to ensure that your shipments arrive safe. Meets most mailing and shipping carrier specifications. Contains a minimum of 30% recycled content. Staples Brand 100% Satisfaction Guaranteed. Double Wall Boxes are manufactured from heavy duty 275#DW/ECT 48 kraft corrugated. Dimensions: 24 x24 x12 . Capacity (Cu. Ft.): 4. 10/Bundle.Stackable These Staples heavy-duty double-wall boxes let you take full advantage of the vertical space in your office or storeroom. With an Edge Crush Test rating of 48 these boxes can be stacked on top of each other without you worrying about them crumpling or buckling under the weight. Spacious Measuring 2 feet wide by 2 feet high by 1 foot deep these Staples heavy-duty double-wall boxes provide ample room for books pictures electronics and other items you want to store or ship. The flaps fold together in a uniform fashion covering the contents completely and making it easy to tape the box closed. This helps protect the merchandise as it goes through the mail system as well as minimize the amount of time it takes to get packages ready for shipping. Earth Friendly These boxes are made from 30 percent recycled content. Once it s time to retire the boxes they can easily be recycled as well reducing the amount of waste sent to landfills. Sold as 10 Each Per Bundle.