These cardboard crates are pallet boxes made from very strong and robust 15mm or 25mm reinforced cardboard. Designed for air freight usage in mind, when combined with a lightweight nestable plastic pallet these crates can significantly reduce the volumetric cost of shipping by air. These crates are much lighter than any wooden or plastic crate and far stronger than any normal cardboard box. The toughest can take 500kg stacked on top and because they are collapsible, they can be shipped back to the source in a stacks thus saving on return costs. They can be reused again and again and so last longer and are more environmentally friendly when compared to single use cardboard boxes.