CARLSONS Choke Tube CREMATOR 12Ga Ported M-Range Ber MobilGauge: .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 Other FEATURES2: REDUCES Pellet DEFORMATION, SHORTENS Shot String,& FEWER FLYERS.Fits Beretta And Benelli Mobil