SUMITUBE™ is heat-shrinkable tubing that takes advantage of the shape-memory effect of plastics enhanced by electron beam irradiation. It is made mainly from raw materials such as polyolefin, fluorinated polymer, or thermoplastic elastomer. SUMITUBE™ is widely used in various industrial fields (electric equipment, automobile, and aviation) for bundling, thermal protection, and insulation protection of electrical wires and harnesses, as well as for other purposes.