THE 7mm DIAMETER SILICONE LEADS ARE MADE BY COMMERCIAL IGNITION AND HAVE THE FOLLOWING SPECIFICATION -

CONDUCTIVE GLASS FIBRE & SILICONE RUBBER CORE FOR EXCELLENT SUPRESSION

HIGH DIELECTRIC EPDM INNER INSULATION FIBRE GLASS BRAIDING FOR ADDED MECHANICAL STRENGTH

FLEXIBLE SILICONE OUTER INSULATION, WHICH WILL NOT CRACK & WITHSTANDS HIGH UNDER BONNET TEMPERATURES UP TO 250 deg C.