This is a O.S. P3 Turbo Glow Plug for use in the O.S. Max .21 VZ-V-Spec and most other .18 to .28 cubic inch turbo head racing engines.

AP Engines introduces this Glow plug for the Wasp .061 engine.

This is an O.S. Type F Glow Plug Medium Four Stroke. This glow plug is designed especially for four stroke engines. This medium heat range long reach plug is shielded so the plug stays hotter to help improve idle RPM.

This is an O.S. Type #8 Glow Plug Long Reach Medium Aircraft/Car. This glow plug is the most widely used O.S. glow plug. It's a long reach, medium heat-range plug suitable for use in most two stroke engines.

This is an O.S. Type #6 A3 Glow Plug Hot Heat-Range for Aircraft. This hot heat-range glow plug is suitable for most two stroke aircraft engines from .10 to .60 size. Its thick, solid platinum coil resists meltdowns and premature failure and its coil holds sufficient heat for a smooth idle.

American made, high quality glow plug! Popular choice among R/C car racers!

This is a McCoy MC-9 Cold Heat-Range Glow Plug. This standard long plug is especially designed for two-stroke engines where you're using 25% or higher nitro fuel.