The Techflex FGN0.38BK10 Insultherm high-temperature resin-coated fiberglass braided sleeve is black, measures 10 long, and can be fitted over wires, cables, and hoses to protect them from continuous, extreme heat in engine manifolds, exhaust systems, or other environments up to 1,200 degrees F. The sleeve is made of resin-coated fiberglass for strength, non-reactivity, and insulation against heat. It can be cut with scissors to fit the application. The sleeve has a nominal diameter of 3/8" and a maximum diameter of 5/8". The wall of the sleeve is 0.043" thick.