Carlson's tss turkey choke tubes are optimized for federal premium heavyweight tss turkey loads but also work exceptionally well with other manufacturer's turkey ammunition (smaller shot size 7-9).The federal premium's heavyweight tss turkey load has an incredibly high pellet count in both 7 and 9 shot, along with the ability to carry energy further, makes them ideal for 12 and 20 ga.Tungsten super shot (tss) has a 22% heavier density than heavyweight shot and a 56% heavier density than traditional lead shot.It puts the maximum amount of pellets possible in a 10 circle at 40 yds.The 12 and 20 ga.Shells will include the flitecontrol flex wad that gives hunters the ability to shoot any choke tube they prefer.Long-range turkeys don't stand a chance.*note- not for use with steel shot.Approved: Steel,Lead,Non-ToxType: 12 Gauge Choke TubeGauge: 12 GaugeConstriction Type: TurkeyConfiguration: Rem ChokeFinish: BlackConstrictiondiameter: .640Chokes Included: 1Recommended For: 40 ydsMaterial: 17-4 Stainless SteelPorted: No