These Double Wall cardboard boxes in size DPB/58 measure 305x229x229mm and suitable for A4 items. The Double Wall structure means that the card used to make these boxes has not one but two robust corrugated layers. This makes the boxes extra strong so they are the perfect choice for transporting heavy or awkwardly shaped items that could damage or pierce a standard box. The thick, double layer card is made from eco-friendly materials and is 100% recyclable. Our double wall cardboard boxes are supplied flat for easy storing and come in bundles of 15 units. To ensure maximum reliable strength it’s important to assemble and seal the double wall cardboard boxes with a good quality packing tape applied firmly across all seams.