Hs strut choke tube undertaker turkey hd port 12ga rem choke FEATURES-Works with high density Hevi-ShotA(R), bismuth & tungsten loads in 12 & 20-gauge shotguns-Blued finish-3" long tube-Knurled end for easy hand installation-Fits 2-3/4", 3" & 3-1/2" guns-Remington & Charles Daly Other Features: Designed for use w/hevi-shot, bismuth,& tungsten,knurled end ,blued finish,3" long,ported fits all remington rem choke guns & charles daly