Mishimoto has developed a line of Heat Resistant Silicone Ducting, available in four sizes to fit a variety of vehicles and uses. Mishimoto Heat Resistant Silicone Ducting can be used to channel cool air to many vital locations in the vehicle such as the brakes, air intake, or even the driving compartment of race vehicles. Universal silicone ducting for cool air Diameter: 4" Length: 12'Silicone construction for improved heat resistance Cool vital locations such as the brakes, air intake, or even the driving compartment of race vehicles Mishimoto Lifetime Warranty