Marine Corps chevron black metal SGT Sergeant E-5 Pair is the official insignia for Sergeant E-5's in the United States military. Sergeants are in charge of day-to-day corporations that take place in the Marines and to follow those who are ranked above them onto their designated troops. This rank pair is the official issue for Marine Corps uniforms. A chevron black metal finish that is sold in pairs can be used for uniform usage on collars and field jackets, but could also be displayed in a shadow box. This rank is sold in pairs and is made and handled in the USA.