DEI Cool-Tube Extreme is able to reflect continuous heat up to 750 degrees Fahrenheit while offering a quality profession look. Cool Tube Extreme is flexible enough to conform to tight bends and provide superior protection against extreme under-hood temperatures, weather conditions and abrasions. Made from a special composite material with a spiral wire reinforced, Cool Tube Extreme is ultra-light that can be slit lengthwise to apply to cables, wires and hoses.