Non-Rusting Stainless Steel
Flush mount, stainless steel tubes available for the many shotguns using the popular Win-Choke thread size and standard Tru-Chokes, plus Remington, Beretta/Benelli, Browning Invector Plus, and Mossberg 835 Ultra Mag. These tubes can be used with magnum and steel shot loads. Tru™-Choke Thinwall tubes are recommended for 2¾" Lead Shot loads ONLY. All X-Full and Turkey constrictions are for use with Lead and Hevi-Shot ONLY!
Big Book Catalog, Issue:72, Page:197
SPECS: 1704 Stainless steel, heat treated. Available for 12 and 20 gauge, depending on model. Win-Choke®-style: .812"-32 tpi (12 ga.) or .687"-32 (20 ga.) fits barrels originally equipped with Win-Choke®, Browning Invector, Mossberg Accu-Choke®, Weatherby IMC®, or Savage choke tubes.