The HSTT50-48-5 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: -67F to 275F (-55C to 135C). Flame retardant, cross-linked polyolefin. 0.50 Diameter x 4 Long (12.7 mm x 1.2 m). Color Black. 5 per package.