United States Navy E-4/5/6 Construction Mechanic Rating Badge
Criteria: Worn by Construction Mechanics (CM) with ranks from Petty Officer 3rd Class (E-4) to Petty Officer 1st Class (E-6). Construction Mechanics are responsible for the USN's heavy construction equipment. They maintain and repair all of the equipment's diesel and gasoline engines, transmission, along with other systems on the equipment.
The badge is sold with all 3 chevrons below the rating for E-6, and can be tailored down to the other two chevrons.