Carlson’s 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. *Note- No steel shot larger than #4 may be used in our Turkey Choke Tubes.