Old school looks with modern Heatshield technology! HP Builder’s Kits feature a heat protective thermal sleeving capable of withstanding 1200-degrees Fahrenheit continuous. This nonflammable sleeve has a special weave that allows it to expand and contract over fittings, terminals, and more. These sleeves can protect fuel lines, preventing vapor lock. They can also be used to protect wires from heat damage and allow you to hide your wiring. The ½-inch id sleeve is ideal for shielding most Harley and motorcycle fuel lines, helping to stop vapor lock and improve performance. The smaller 5/16 inch sleeve is great for small wire looms and brake lines. The 5/8 inch inside diameter sleeves are ideal for protecting your oil lines from heat damage caused by being too close to the motor or exhaust. Try the 1-1/4 inch inside diameters sleeves for your sport and moto bike radiator lines. So add some heat protection and make your ride a cooler one.