The 6-8” 2-1-8” Side Tuft Tube Brush by Walker is a high-quality abrasive brush made of carbon steel, designed for metalworking supplies. With a burrite shank style and a wire diameter of 0.0030 inches, this brush offers durability and effectiveness in cleaning and removing impurities from tubes and pipes. Its overall length of 2.12 inches allows for easy handling and reach into tight spaces, making it a valuable tool for various industrial applications.