The Iosso Eliminator Bore Brush in .20 caliber features premium cobalt blue fiber construction that delivers superior cleaning performance compared to traditional brass and bronze brushes.Iosso Eliminator Bore Brush - .20 CaliberCobalt blue fiber material - thicker and stiffer than traditional brushesAllows safe back and forth cleaning actionWound tighter with more fiber per inch for enhanced cleaningReusable design - can be used multiple times before wearingCompatible with Iosso Bore Cleaner and Triple Action SolutionRemoves copper lead plastic wad and carbon foulingIdeal for rifle maintenance this premium brush drastically reduces cleaning time while delivering an unbelievably clean bore. The distinctive blue fiber is a trademark of Iosso Products ensuring authentic quality and performance.