Carlsons TSS Turkey 20ga Benelli Crio/Crio Plus Turkey Choke Tube - 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 12/20-gauge. Tungsten Super Shot (TSS) has a 22-percent heavier density than heavyweight shot and a 56-percent heavier density than traditional lead shot. It puts the maximum number of pellets possible in a 10in circle at 40 yards. The 12/20-gauge shells will include the FliteControl Flex wad that gives hunters the ability to shoot any choke tube they prefer. Steel Shots Larger than #4 may not be used in these Turkey Choke Tubes. Benelli Crio/Crio Plus Turkey Choke Tube