Our Double Wall cardboard boxes in size DPB/12 are cube shaped boxes measuring 305mm x 305mm x 305mm. The boxes are made from an extra strength card that has two corrugated layers instead of one; this means these boxes are suitable for carrying heavier loads safely. The card is made from recycled and sustainable materials and is a standard Natural Kraft colour. The double wall cardboard boxes are supplied flat packed and are easy to assemble using packing tape. DPB/12 boxes are a convenient size for posting or moving and storing heavier items with the durable double corrugated layer structure providing reliable protection during transportation.