Keep your firearms well maintained with the quality construction of the Otis All Purpose Receiver Brushes. These brushes are the ideal way to safely scrub out carbon, powder, and other residue without the worry of damaging your firearm. Choose from a variety of brushes and get the job done right. Mfg: Otis SPECS: 50 pak contains white nylon brushes only. Variety Bulk Pack All Purpose Brushes contains: 3 White Nylon, 3 Bronze, and 3 Stainless Steel A/P Receiver Brushes.