Aviditi is your premier source for all of your corrugated needs With over 1,600 corrugated box sizes available, our huge selection ensures you can choose the right size box for any application. Aviditi's corrugated box assortment has many styles to choose from including standard, flat, tall, heavy-duty, double wall, triple wall boxes and much more Check out the Aviditi store for a full selection of corrugated boxes Product Specifications: 18 x 18 x 8" Double Wall Boxes. Inside dimensions measure 18-inches (length) x 18-inches (width) x 8-inches (height). Carton capacity is approximately 1.5 cubic feet. Aviditi Double Wall Corrugated Boxes are great for packing, shipping, moving and storing heavy-duty items. Heavy-duty, professional grade construction provides twice the protection of a standard carton. Boxes are easy to assemble, fold together in seconds and proudly made in the United States. These boxes are manufactured from heavy-duty 275/ECT-48 double wall, c-flute kraft corrugated. Estimated weight capacity is 100 lbs. (This is only a guide, weight must be distributed evenly). Package includes 15 double wall boxes and ship flat to save on storage, space and shipping. Corrugated boxes are reusable and recyclable.