PTP Heat Reflective Sleeves create a thermal buffer between your wires, hoses and cables and the high temperature environments surrounding them. They are engineered by laminating an aluminized metallic heat shield to a layer of strong, tightly braided fiberglass insulation. This system provides superior protection from radiant heat by reflecting it away from sensitive electronics, wiring and hoses. The PTP Heat Reflective Sleeves can endure temperatures up to 1,200°F without delaminating or turning brittle, resists gasoline and engine chemicals, and cuts cleanly with scissors for custom fit applications.