O.S. #A3 glow plug has a hot heat range plug for most model engine applications. Works well in any engine from .10-size to .60. Thick, solid platinum coil resists meltdowns and premature failure. Coil holds sufficient heat for a smooth idle. Finest glow plug in the economy price range. No idle bar. This product includes one #A3 glow plug and one glow plug ring.
