SONIC GUN CARE .22cal Pistol Bore Brush Our Precision designed red brushes are made with extremely high-quality stiff nylon. Nylon brushes are safe but yet very effective for cleaning even on Some of the toughest cleaning jobs. Solvent Resistant. Brushes Come Packaged In A Clam Shell, Great For Storage 8-32 Threaded. Fits The Following Calibers: .22 .22 Long MADE IN AMERICA.