For use with O.S. GG series gasoline powered engines that use a glow plug instead of a spark plug for ignition Specifically designed for a gasoline/oil mixture Uses standard glow igniter. INCLUDES: One glow plug and one brass washer SPECS: Threads on the plug are 1/4-32. Video Links: https://www.youtube.com/watch?v=wif4PgSYDZs https://www.youtube.com/watch?v=9EFZPSaaVio