The HellermannTyton 309-17602 Heat Shrinkable Tubing 2:1 flexible 76.0/38.0 red is a type of electronic part made to protect wires, terminals, joints, and other electrical components. It is an insulated, flexible, flame-retardant tubing made with a cross-linked polyolefin material that shrinks to 2/3 its original diameter upon heating. It is typically used to wrap cables and wires, creating a neat and professional appearance while also providing moisture and corrosion protection. In addition, the heat shrinkable sleeving helps form a seal when used to terminate splices and provide a strain relief for both cable and connectors. The Heat Shrink Tubing and Sleeves come in red and other colors, depending on the manufacturer and their specific product line. It is UL and CSA recognized for 600V, -55°C to +135°C, and offers superior abrasion, mechanical damage, and chemical resistance.