Breakthrough Clean Technologies Battle Rope is designed to loosen large particles and scrub the bore in one complete motion. Cleaner and lubrication can be applied to the robe for a one pass treatment system. The Battle Rope is machine washable and can be used until the bronze bristles are no longer effective.Specifications: Battle Rope Bore Cleaner Battle Rope Shotgun Length Machine Washable Features a Detachable Hard Nylon Brush Green FinishFits: 12 Gauge Shotguns