ID: 3/8" (10mm). Length: 5 feet. Made of standards silicone rubber coated fiberglass sleeve, can be cleaned and protects against abrasion Burn protection during under hood repairs and maintenance, helps to prevent vapor lock, protects wires from melting High-temperature, flexible insulating sleeving withstands 500 Degree Fahrenheit continuous heat and up to 1000 Degree Fahrenheit intermittent heat Resistant to hydraulic fluids, lubricating oils, and fuels, insulates against energy loss in piping and hosing Ideal for protecting hoses, electrical wiring, oil and fuel lines from heat and to prolong the life This rugged silicone fire heat shield sleeve makes it resistant to chemicals, abrasion, and fraying. You can also use the Fire Armor for brake lines, fuel lines, wiring harnesses, and cables. In addition you can the rugged silicone coating makes this heat shield sleeve ideal for protecting welding lines and cables.