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New Thermo-Tec Express Sleeves are exactly what you've been looking for. They're an easy-to-use combination of insulation and Mylar foil with Velcro closures. Designed to be fireproof and to reflect over 90% of radiant heat, the sleeves protect hose, wires, and cables. Simply pull apart a sleeve, wrap it around intended wire, and close the sleeve. Sleeves are 3', 12', or 50' long (1-1/2" diameter).