ID: 1-1/2", Length: 5 feet, heat shield fire sleeve Made of standards silicone rubber coated fiberglass sleeve Operating Temp: -60 C degree - 260 C degree, Flammability: VW-1, Inner Sleeve: Fiberglass, Coating Material: Silicone Silicone layer can be cleaned and protects against abrasion, Burn protection during under hood repairs and maintenance, Helps to prevent vapor lock, protects wires from melting Used to protect fuel lines, hydraulic and oil lines from heat and to prolong the life of wiring and hoses in case of fire so that critical systems can function longer in the aviation and marine fields 1.5 inches ID Heat Shielded Fire Thermo Armor Fire Sleeve Silicone Coated Fiberglass for Hose Lines & Electrical Wiring