This kind of crate is made of 100% Virgin HDPEor PP. It could be used for fruit,vagetable,fish and other products packing or transport. Without steel strapping lugs But you canput them 0°and 180°to help stop crate riding up against each other. If you want to transport them, you can put them all against the same side in order to save volume Please see the picture,it can show you clearly.