Design Engineering 010552 Protect-A-Boots Angled Spark Plug Boot Protector Sleeves - Silver (Pack of 8) Superior protection for extreme angled plug wire boots Withstands up to 1200F of direct heat 1-1/4 I.D. at both ends fits nearly every type of boot Easy to install with pliable construction - slip over plug boots Made from a tightly woven high temperature resistant glass fiber material