Specifications: -------------Nominal Size: 1/2" Sleeve Length: 5 feet Available in Silver Only ExtremeShield Flexible Tubing provides easy slip-on installation and outstanding protection for your wires, hoses and cables from temperatures up to 12 deg F. This product features an aluminized heat shield that is laminated to tightly braided fiberglass insulation which provides superior protection from radiant heat. This tubing is not expandable so be sure to measure your application carefully.