HellermannTyton's 315-13011 is a double-walled heat shrinkable tubing with an adhesive liner, designed to provide superior electrical insulation and mechanical, chemical, and environmental protection. It is comprised of a crosslinked polyolefin material that shrinks up to one-third of its original size and features a melted adhesive liner inside the tubing walls that melts and flows when heated, creating a permanent bond that seals out moisture, dust, and other contaminants. This particular product features a thin wall 3:1 shrink ratio, a length of 1.2 meters, and a black color. It is recommend for use in electrical insulation, mechanical protection, environmental protection, and strain relief and available in other sizes and colors.