Choice Shipping Supplies is your primary source for all of your corrugated needs!Our large assortment has many box styles to chose from such as standard, heavy-duty, tall, flat, specialty moving boxes and much more! With over 1,600 corrugated box sizes available, our huge selection ensures you can choose the right size box for any application. Check out the Choice Shipping Supplies store for a full selection of corrugated boxes!Product Specifications: 40 x 20 x 20" Double Wall Boxes. Package includes 5 double wall boxes per bundle. Boxes ship flat to save on storage, space and shipping. Corrugated boxes are reusable and recyclable. Inside dimensions measure 40 inches in length x 20 inches in width x 20 inches in height. Carton capacity is approximately 9.259 cubic feet. Double wall corrugated boxes are great for packing, shipping, moving and storing heavy-duty items. These boxes are manufactured from heavy-duty 275#/ECT-48 double wall, c-flute kraft corrugated. Recommended weight capacity is 100 pounds. This is only a guide, weight must be distributed evenly. These boxes provide twice the protection of a standard box. Heavy-duty corrugated provides better protection and stacking strength. These boxes fold together in seconds and easy to assemble. Made in the United States.