This is a Hoppe's Brush known as the Nylon, model 1309.
Hoppe's has become the most trusted name in gun care by advancing and evolving technologies to meet the needs of hunters" shooters" and soldiers who depend on their firearms every day. Hoppe's is the only name you need to know for firearm cleaning and protection.
Features:
Stout Bristles for Efficient Cleaning
Effective on Lead