The unique square shape of corrugated tube boxes makes it easy to position and remove objects. Because square mailing tubes are made of 32 ECT white corrugated cardboard with securing tabs, you will not need any additional materials to construct the packaging, even if it is made of corrugated cardboard. Due to their square design, they will not roll on conveyors like traditional round tubes, and they will keep your items well protected from harm caused by the outside environment.