Tetra ProSmith Brass Core Bronze Brush (5/40 Thread) .204 cal
Tetra ProSmith Brass Core Bronze Brush (5/40 Thread) .204 cal, Tetra Gun ProSmith tightly wound precision brass core brushes effectively remove fouling from gun barrels. Industry standard 8-32 male thread (5-40 for .17 Cal. & .204 Cal.) 5/16-27 male thread (12, 20, 28 & 410 Gauge) Close tolerance specifications for perfect bore fit Will not harm or scratch steel Durable and reusable