Instantly add heat protection to your wires with our thermal insulating wire jacket. The heavy duty construction features aluminized cloth on the outside with a heavy duty glass insulator in the middle. The heat shield wire jacket is 12" long and has an adjustable inside up to 2 ½" diameter. It is capable of withstanding 1100°F continuous radiant heat and 500°F direct contact. Installation is easy thanks to the hook and loop fasteners.