1/2'' Nominal diameter clear polyolefin heat shrink tubing with adhesive that flows when heat is applied, creating a transparent and permanent water tight seal from the elements. Dual wall material is an excellent insulator and provides superior protection from abrasion. With a shrink ratio of 3 to 1, the tubing can be used in a variety of applications. Operating temperature is from -49°F to 257°F (-45°C to 125°C). Shrink temperature is 230°F (110°C). Sold in 4 foot sticks.