Carlsons Extended Turkey Choke Tubes 20 ga. Winchester .575
17-4 heat treated stainless steel;Extends 1" from the end of the barrel;1.050" parallel section to produce optimum patterns;No steel shot larger than #4
17-4 heat treated stainless steel;Extends 1" from the end of the barrel;1.050" parallel section to produce optimum patterns;No steel shot larger than #4