United States Air Force Senior Master Sergeant E8 DIA Rank Insignia Pin by Eagle Emblem Inc (P03112). Features 4 rockers at the bottom, 3 stripes, and 2 reverse rockers on top with a diamond underneath and a star in the center. Air Force blue background with all rockers, stripes, and star in silver. Metal construction with clutch backing. Measures 1 9/16" across. Sold individually. Ideal for uniform, hat, lapel, or shadow box display. The DIA represents the diamond which is a special duty position for the morale, welfare and conduct of all enlisted personnel in a unit.