Champion spark plugs are a top choice of engine manufacturers, maintenance technicians and pilots around the world.
The REM40E spark plug features:
Thread size: 18 mm
Reach: 1/2"/1.27 cm
Shielded Threading: 5/8" - 24
Standard Electrode: Two Prong
Plug Gap: .016"-.021"/0.41-0.53 mm NOTE: Spark plugs are shipped in factory sealed plastic cases. Opened spark plug cases make the spark plugs non-returnable. Please do not open any spark plug until you are sure you have received the correct spark plugs for your application.