The bristles are made from high-quality bronze, which is much softer than barrel steel. Aggressive enough to clean away lead fouling, copper fouling, and powder residue.
- Core Material: Looped Steel Wire
- Bristle Material: Bronze
- Standard 8x32 male thread
- Includes Qty. 1 Brush
- 9MM=0.357 inch=.357 caliber
Compatible with 8 X 32 thread size such as Hoppe's and works with all cleaning kits on our site.