Rated for 12F, Dual Wall Construction, Sealable End Keeps out Dirt & Heat

Pro-Boot Shield protects spark plug boots with an innovative closeable end and features a dual layer construction. The closeable end keeps dirt out and seals out heat making them ideal for high-heat and off roading applications. Available in straight, 135 deg, and 9 deg. Pro-Boot Shield is designed to have a professional look after it has been installed. Composed of the lava rock-based fiber, basalt, these boots are 25% stronger than fiberglass predecessors, making these shields built to last. The Lava(TM) fiber also offers some abrasion resistance, and is chemical, oil, and even acid resistant.