Thermo-Sleeve's ultra light-weight construction provides more insulating than traditional bulky rubber-coated fiberglass. The aluminized sleeving reflects over 90% of radiant heat, and is fireproof and oil resistant. The Thermo-Sleeve can handle conductive heat temperatures of 750º F and radiant heat temperatures up to 2000º F. Thermo-Sleeve is packaged in 3, 12, and 50 foot lengths, and is sold in five different inside diameter sizes. Thermo-Sleeve is available in custom lengths for special applications. Typical applications include brake, fuel, oil and a/c lines. Made in the U.S.A.!