Silicone boots with grips make it easy and safe to check or change spark plugs. Straight coil boots with brass terminals. Boots feature spring-locking terminals. Highest voltage capacity and double-interlocking plug connectors. Ferro-magnetic inner core provides ten times the fire power of a carbon core. Spiro Pro core for electronic or points ignitions. Metallic core for points and magnetos. Resistance factor of 350-Ohm/ft.. 600 degrees heat protection. Includes two 24" lead wires and two black boots with brass terminals. Made in USA. Spiro Core Black, 8mm, 90°, Spiro Core
