Protect your ignition wires from extreme heat while adding vivid color to your engine compartment. Protects spark plug wires from the extreme temperatures of headers and exhaust manifolds. Withstands 500 deg F direct continuous and up to 1200 deg F radiant. Eliminates misfires and possible engine damage from burned wires. Fiberglass composite wont cause misfires by arcing. Includes Hi-temp Shrink Tubes for a sharp, finished appearance. Can be used on any hose or wire up to 10mm.