Designed for use in .12-.15 and .18 size engines used in monster trucks such as the original and newer 2.5 and 3.3 Traxxas T-Maxx trucks. Unlike other O.S. standard plugs, this is a long body glow plug and should NOT be used in O.S. off-road engines, only Traxxas engines and other engines that need a hot, long body glow plug.
