Carlson's Choke Tubes 11565 Cremator Beretta Optima HP 12 Gauge Mid-Range Ported 17-4 Stainless SteelCarlson's Cremator Choke Tubes feature our new Triple Shot Technology 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 allow a more gradual transition from the shotgun bore to the final constriction. The Cremator offers reduced pellet deformation, less flyers, more dense patterns, wrench less installation, quick removal and muzzle protection. Made in the