The HellermannTyton 300-73090 Heat Shrink Tubing and Sleeves Low-Heat Shrinkable Tubing 2:1 self extinguishing 19,1/9,5 black is a heat shrinkable tube product designed to provide electrical and mechanical protection to harnesses, cables and wires. It is made up of a specially formulated, thermally stabilized, crosslinked polyolefin that shrinks to half its original diameter when exposed to heat. The self-extinguishing material helps prevent the spread of fire and smoke during extreme conditions and offers superior abrasion, chemical, and electrical resistance. This tubing is flame retardant and the black color offers a clean, professional look. With an operating temperature ranging from -55°C to +125°C the HellermannTyton 300-73090 tubing product is suitable for a variety of industrial and consumer applications.