Beretta Optima HP 12 Gauge Cremator Ported Waterfowl Choke TubesCarlson’s Cremator® Choke Tubes feature our brand new Triple Shot Technology (TST) and is offered in close mid and long range constrictions. TST is a series of three graduated rings in the taper section of the choke tube that allows a more gradual transition from the shotgun bore to the final constriction. This design offers reduced pellet deformation, less flyers and more dense patterns. These benefits make the Cremator® Series extremely effective on all types of waterfowl throughout the entire season. The Optima HP Cremator® series has no size or speed restrictions with steel shot in the Close or Mid Range constrictions. The Long Range is limited to no steel shot larger than #2. You also get all the benefits of an extended choke tube, including a 25% longer parallel section for tighter and more dense patterns, wrench-less installation, quick removal and helps with muzzle protection. Like all of our tubes Carlson’s Cremator® Series Choke Tubes are made in the U.S.A., carry a lifetime warranty and are precision-machined from heat-treated 17-4 stainless steel. NOTE: Optima HP and Remington Pro Bore Long Range cannot be used with any steel shot larger than #2.