TT Racing Lava Boot Shields feature a no-fray cuff with a flexible dual-wall high-temperature basalt sleeving with a 1,200-degree F working temperature that prevents plug and wire burnout even in the most demanding ambient heat applications. Lava Boot Shields help eliminate misfires caused by plug-wire and spark plug boot burnout, helping prevent critical engine damage and loss in performance from a cylinder not firing. In addition, Lava Boot Shields protect your wires and boots from being damaged by excessive engine and exhaust heat. The universal design fits most boot sizes and angles, including 90-degree boots. We have standard sizes, which are a great fit for most engine applications, and our 6-inch-long 1-inch internal diameter Lava Boot Shields are great for LS engines. This hose provides you with unsurpassed levels of performance and reliability for your tough performance applications. This hose is ideal for high temperature, high pressure, and offers wide range of fluid compatibility. This hose is made of high-quality Polyurethane on the inside that gives them high chemical and heat resistance, along with a braided stainless steel outside which gives them high durability, extreme pressure resistance, and a professional and high-tech appearance. They are smooth bore for optimal flow. Polyurethane is flexible and strong and when combined with stainless steel braid can perform under high pressure and continuous flexing and vibration conditions.