Copper Eliminator Bore Brushes are designed with machined aluminum components to prevent false positive indications of copper fouling when using ammonia-based solvents.
The brushes are safe for use on barrels, as they are similar in hardness to brass and feature nylon bristles that are gentle on rifling.
Available for 20 caliber (.204) firearms, the brushes come with a male-threaded aluminum coupling and are sold in packs of three.