Gauge: .12 Gauge Choke/Id: Mid Range Flush Or Extended: Extended Material: Stainless Steel Other FEATURES:: Triple Shot Technology Of 3 GRADUATED Rings In Parallel Section Of The Choke That Allow A Gradual Transition To Final Constriction OCremator choke tubes feature Triple Shot Technology to deliver reduced pellet deformation with a shortened shot string and less flyers. Three graduated rings in the parallel section of the choke allow a more gradual transition to the final constriction. These choke tubes are ported to reduce muzzle jump and recoil. Crafted from premium 17-4 stainless steel, Cremator tubes install and remove without a wrench. Take advantage of the spectacular performance of today's premium ammo by stepping up to the best choke tube technology!