Navy Male Hard Shoulder Board - Medical Corps - Sold in Pairs SBBA~Double~11032DBR Shoulder marks for officers are

Shoulder marks for officers are black with a 1/8-inch yellow stripe below the embroidered grade insignia

United States Air Force Miniature Air Battle Manager Badge

While on a "dismounted" (on foot) field navigation

United States Army Epaulets - Large Size

It can be attached to any belt of choice and is available in two styles: Male and Female

Navy Male Hard Shoulder Board - Medical Corps - Sold in Pairs SBBA~Double~11032DBR Shoulder marks for officers areUnited States Navy Male Hard Shoulder Board Medical Corps Criteria: Navy Hard Shoulder Boards are designed to be worn on the following Naval uniforms: Dinner Dress Jacket Uniform (men only), Summer Blue Uniform, Summer Dress White, and Summer White Uniform. Available in O 1 through O 6 rank. Note: Sold in Pairs