, never been used Color: Red Length: 6" (15.5 cm) ID: 1" (22 mm) Temperature Protection: Non-flammable, protects spark plug boots and spark plug wires from excessive engine and exhaust heat Material: 8 pcs spark plug boot protector made from double wall braided fiberglass sleeving (triple wall at sewn end), offers great durability, fits all spark plug boots and wires up to 2500 degrees Fahrenheit (1371 C) Easy Installation: Just slip on (sewn end over spark plug) for maximum protection; spark plug boot heat socks can withstand heat up to 2500 degrees Each boot is 6 inch length; boots will work with 90 degree, 45 degree, and straight spark plug boots Sleeves are halogen free and non-conductive; sleeves resist gasoline and all engine chemicals Other Features: The spark plug wire sleeves can rest directly on hot headers and other engine components without burning, melting, or becoming brittle Professional installation is highly recommended (no instruction included) Fitment: Fits most hot rods and classic engines including GM, Chevy, GMC, Olds, Cadillac, Pontiac, Buick, Ford, Mopar, Chrysler, Dodge, Plymouth