Design Engineering 010409 Aluminized Plug Wire Sheath for Ultimate Heat Protection, 0.75" x 6" (Pack of 4) Capable of withstanding 2000F radiant heat Inexpensive alternative for protecting ignition wires and boots Other uses include electrical wiring and harnesses, hoses, cables, and more Easy to install 3/4-inch diameter and 6 inches long; 4 per pack