Our largest extra-strength double wall cardboard boxes are made entirely from card that is reinforced with two corrugated layers making it thicker and stronger than standard boxes. The double wall cardboard boxes are sized at 610x457x457mm so they are a great choice for removals, office re-organisation and archiving, as well as being an effective packaging solution for items that need to be posted or couriered safely. These double wall cardboard boxes are also made from recycled and sustainable sources and is also fully recyclable. Supplied flat for your convenience these boxes need to be secured thoroughly with good quality packing tape to achieve the best, most reliable performance.