Extra-stiff, twisted wire, stainless steel brushes are tapered and sized to fit X"XrightX"X in the port to loosen wad residue and carbon fouling; leaves the port clean and ready to go. Mfg: Brownells SPECS: Bristles – stainless steel, .005" dia. 202 – 6" (15cm) overall length, .125" (6.3mm) diameter. Fits most barrel ports. 238 – 7" (17cm) overall length, .187" (4.6mm) diameter. Fits Colonial Arms ported choke tubes. Sold in 3 Paks and 12 Paks.