The Iosso Nyflex Shotgun Bore Brush is specifically designed for .410 gauge shotguns providing effective cleaning with advanced Nyflex bristle technology.Iosso Nyflex Shotgun Bore Brush.410 gauge specificationNyflex bristle construction for thorough cleaningDesigned specifically for shotgun bore maintenanceEssential for proper shotgun maintenance this brush effectively removes fouling and residue to keep your .410 gauge shotgun performing at its best.