Manufactured from 17-4 heat treated stainless steel to withstand heavy buffered Turkey Shotshells. These choke tubes produce extra tight patterns with copper plated and buffered lead turkey shotshells. Our Extended Turkey Chokes extend approximately 1" from the end of the barrel. We have found the .665 Extended Turkey Choke Tube to produce the most consistent patterns with turkey loads. Our Extended Turkey Choke Tubes have 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.