Keeps lines and hoses cool, flexible, and protected-resists abrasion and reflects damaging radiant heat up to 2000F. Precision-engineered using 19 oz high-temperature glass fiber insulation, finished with a durable aluminum outer layer. Reinforced with aramid thread for outstanding heat resistance, abrasion durability, and flame-retardant performance in high-temperature environments. Quick, easy installation: simply unhook the line or hose, cut to desired length, slide on, and reattach. Proudly manufactured in the USA with a focus on quality and craftsmanship.