Thermo-Tec 14005 3' 1/2" I.D.Thermo-Sleeve Thermo-Sleeve's ultra light-weight construction provides more insulating than traditional bulky rubber-coated fiberglass The aluminized sleeving reflects over 90 per cent of radiant heat, and is fireproof and oil resistant The Thermo-Sleeve can handle conductive heat temperatures of 750 degrees Fahrenheit and radiant heat temperatures up to 2000 degrees Fahrenheit Typical applications include brake, fuel, oil and a/c lines