Carlson's Choke Tube Beretta Benelli Mobil 12 Gauge Flush Mount Replacement Stainless Choke Tubes, Imp Mod, Silver (16615)

These chokes are made of 17-4 heat treated stainless steel. Steel or lead shot may be used in these choke tubes. Steel shot larger than BB should not be used in any choke tighter than modified. BB and smaller size steel shot may be used through full choke constriction.