The HellermannTyton 321-00104 Heat Shrink Tubing and Sleeves is a 4:1 thick wall adhesive lined length 1m 40/12 black GL-certificated product. It is made of a heat-shrinkable polyolefin tubing material with a wall thickness ratio of 4:1 and a melting temperature of 110°C. This product is designed to provide an extra-tight connection and insulation properties. It is applicable in areas such as electronics, automotive, telecommunications, and data processing system, and is suitable for insulation, strain relief, and cable identification. It is easy to install and comes with excellent adhesion and toughness. The advanced technology further ensures immunity to chemical environments, fuels, and many abrasive substances.