This is the O.S. T-Series RP6 Medium Heat Range Turbo Glow Plug.
FEATURES: T-series glow plugs are ideal for racing car engines that create high RPM For .12, .15 and .21 size turbo head on-road...
The O.S. #8 glow plug is the most widely used O.S. glow plug. Recommended for most current O.S. (and other brands of) 2-stroke R/C engines.
FEATURES: Medium heat range plug for most model engine...