Otis' bore brushes have a proprietary tufcor core wire that is corrosive-resistant and has a tighter twist for better bristle retention with twice the fill of other brushes with bristles right to the end.Each brush features the size stamped on the stem and color-coded core wire to easily identify the brush size.Includes:.22/.27/.30/.38/.45 caliber bronze brushes.Type: Bore BrushSize: .22-.45 CalQuantity: 10 PackBristle Type: BronzeIncludes: .22/.27/.30/.38/.45 Caliber Bronze BrushesMaterial: BrassSuitable For: Firearms