12V /24V HEETER PLUGS “HKT” MADE IN JAPAN

The heat elements at the tip of these glow plugs are made of metal. There are two types: the single coil type, and the dual coil type which uses both heating coils and regulating coils.
Metal types are classified into six categories by engine type and control systems for which the glow plugs are used: Standard, Quick, Quick glow system (QGS type), Super quick (SQ type), Long post heating (LPH type), and Instant glow system (IGS type).