Manufactured using a decent quality, single wall board, these brand new boxes have a reasonable stacking strength, once made up. If you are looking for a low cost, medium sized carton to pack and ship your goods, then try a pallet of these out while we have them available! These brand new cardboard boxes came into us after a company changed their product line, rendering these boxes useless. They have never been used and are still in fantastic condition. Again, this is a one off supply and they will not feature online again in the future!