A paper tube is the core around which CAD roll paper is wound. The roll paper itself is not included. The cylindrical material is made of paper, but it has a firm rigidity similar to plastic and is not easily damaged. Its uses include storing and keeping materials and parts, but it is also used in logistics and packaging to protect special long items and precision machinery. In addition, it can be used in a wide variety of applications, such as displays, architecture, art pieces, panels, and objects. The size of the cylinder is 95cm in length, 4mm in paper thickness, and 7.5cm in inner diameter. There are nearly 20 cylinders in stock, but this offer is for a set of 3.