Temperature protection: non-flammable, protect spark plug shoes and spark plug wires from excessive engine and exhaust heat. Material: Made of double wall braided fiberglass sleeve (triple wall on sewn end), offer excellent durability, fits all spark plugs shoes and wires up to 2500 degrees Fahrenhett (1371°C). Easy installation: simply slide in (sewn-in end above the spark plug) for maximum protection, thermal socks with ignition can withstand heating up to 2500 degrees. Each shoe is 6 inches long, the boots will work with 90 degrees, 45 degrees and straight spark plug boots. The sleeves are halogen-free and non-conductive, the sleeves are resistant to gasoline and all engine chemicals. Other Features: Spark Plug Wire sleeves can rest directly on hot headers and other engine components without burning, melting or becoming brittle. new, never used Fitment: Fits most hot bars and classic engines, including GM,Chevy,GMC,OLDS,CADILLAC,PONTIAC,Buick,Ford and Mopar,Chrysler,Dodge,Plymouth)Color: BlackMaterial: FiberglassSize: 15.5cm Package Contents: 8 * Black Spark Plug WireProfessional installation is recommended. (no instructions included)Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.