Beschreibung Schutz:Helps prevent burning, hardening and cracking of boots. Header heat wrap spark plug heat protector for both boot and wire, can protect the performance of your expensive spark plug wire assembly and increase their life span using for SBC BBC 350 454. Durable material:The candle wire sleeving is made of two layers of fiberglass. It has good high temperature resistance and anti-corrosion effect, and the heat insulation temperature can reach 1500 degrees. Compatibility:Length 6.1"(15.5cm), ID 1.4"( 35mm), it will work with 90 degree, 45 degree, and straight candle heater socks. Professional Installation:No instructions are included. Just slide the large end (with seams) over the boot. Then, carefully slip the ringed end over the boot that connects to the spark plug. The other end is covered with a metal circle for easy installation. Package includes:8 pieces. Wear gloves and long-sleeved clothing before installation to prevent stone fibers from falling on your body.