– O.S. Engine Glow Plug #7 Medium Hot

This is the O.S. #7 Medium Hot Glow Plug for 2-Stroke Engines.

FEATURES:

• Slightly hotter heat range than the O.S. #8 plug
• Newly developed to focus on easier running at low and medium speeds
• Ideal for helicopter engines with superior performance around hovering RPM
  range-critical for smooth and powerful 3D and F3C type flight
• Also great all around plug for most 2-stroke airplane, helicopter and car
  (except turbo head) engines

How to Choose the Right Glow Plug? Please refer to the following link.
http://www.osengines.com/accys/choosing-glowplugs.html