Real Avid Bore-Max Speed Clean System Pistol/Rifle Brush Multi-Cal Pack Nickel-Plated 10-Pack. Bore-Max Speed Brushes have twice the bristle density of standard brushes for maximum scrubbing power and faster results. Stiff nickel-plated phosphor bronze bristles reduce chemical breakdown from solvents and extend the life of the brush. Specifications for Real Avid Bore-Max Speed Clean System Pistol/Rifle Brush Multi-Cal Pack: Manufacturer: Real Avid Fabric/Material: Nickel-Plated Phosphor Bronze Caliber: Universal Color: Grey Features of Real Avid Bore-Max Speed Brushes Multi-Cal Pack Stiff nickel plated phosphor bronze bristles eliminate chemical breakdown in the bore and extend the life of the brush 10 popular handgun and rifle calibers in a convenient storage case Twice the bristle density of standard brushes for maximum scrubbing power Package Contents: Real Avid Bore-Max Speed Clean System Pistol/Rifle Brush Multi-Cal Pack Real Avid AVBMSBS: Bore-Max Speed Clean System Pistol/Rifle Brush Multi-Cal Pack Nickel-Plated 10-Pack