The HSTT50-48-545 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: 3:1. Temperature range: -67°F to 275°F (-55°C to 135°C). Flame retardant, cross-linked polyolefin. .50" (12.7mm) Diameter, Color: Yellow/Green, 5 pc. per pkg.