United States Navy E-4/5/6 Engineman Rating Badge
Criteria: Worn by Engineman (EN) with ranks from Petty Officer 3rd Class (E-4) to Petty Officer 1st Class (E-6). Enginemen are typically responsible for all of the internal diesel and gasoline engines used by the USN. They maintain and repair all of these engines along with maintaining refrigeration, air-conditioning and compressor units.
The badge is sold with all 3 chevrons below the rating for E-6, and can be tailored down to the other two chevrons.