Carlson's Extended Turkey Choke Tube Fits Beretta or Benelli Mobil Choke System - 12 Gauge .650 Constriction Extended Turkey Choke Tubes extend approximately 1" from the end of the barrel. They are manufactured from 17-4 heat treated stainless steel and have a matte blue finish. Our Extended Turkey Choke Tubes feature a 1.050" parallel section to produce the optimum pattern with your shotgun Not for use with steel shot *Choke pictured at right is for illustrative purposes. Actual choke may appear different from photo but will fit the model and make of your shotgun.