The HSTT75-48-5 Thin Wall Heat Shrink Tubing Shrinks Around Wires, Connectors, Joints, and Terminals When Heated to Protect Against Abrasion. Applications Include Insulating and Protecting Wires/Cables In Indoor, Dry Locations. Shrink Ratio: 2:1. Temperature Range: -67°F to 275°F (-55°C to 135°C). Flame Retardant, Cross-Linked Polyolefin. 0.75” Diameter X 4’ Long (19.1 MM X 1.2 M). Color Black. 5 Per Package.