A thin-walled, flexible heat shrink tubing with a 2:1 shrink ratio made of cross-linked polyolefin. It is available in 10 sizes ranging from 1.2 mm to 25.4 mm in diameter, in black, red, blue, clear, and yellow-green colors. The tubing is supplied in a convenient to use and store cardboard box, rolled up. The primary area of application for this product is electrical insulation and protection against mechanical damage and corrosion.