Proflow's ignition lead wire Pro Sleeve kit is high temp silicone sleeve jacket with a fibreglass woven liner that slides over your ignition leads when assembling custom made leads. Insulates against spark scatter / crossfire . Sleeve can withstand up to 480 degree C. 25 foot roll is ample to protect a full set of long V8 leads including coil. Most of the other brands give you cheap shrink sleeve to finish off the ends, our kit is supplied with our special self vulcanizing tape to give you a water tight, flexible and professional finish. Instructions on how to get the best results from the tape are included