The HSTT38-48-Q 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. 0.375” Diameter x 4’ Long (9.5 mm x 1.2 m). Color Black. 25 per package.