Otis FG350NB Bore Brush Set 50 Cal/12.7mm 8-32 Thread 2 Long Bronze/Nylon Brush 2 Per Pkg”

Otis brushes have a proprietary Tufcor core wire that is corrosive-resistant with a tighter twist for better bristle retention and brush life. Includes: 1 Nylon Brush/1 Bronze Brush. Cleans: .50 Cal 12.7mm.