Breakthrough Clean BT-20GPBBB Phosphor Bronze Brush 20 Gauge 5/16-27 Brass/Bronze Bronze Brush This Durable Phosphorous Bronze bristled Brush Is For Effective Cleaning Without Damaging Your Bore. The Twisted Brass Core keeps Brush Rigid And Has a deeper Cleaning Action Than Nylon Brushes. The Brush Has a Standard #8-32 Thread. Bristle Type: Bronze Material: Brass/Bronze Thread Pattern: 5/16-27
