Standard 20ga. Extended Choke Tube. These steel standard extended choke tubes feature a matte blued finish, and will fit all Franchi 20 gauge shotguns that utilize standard Franchi chokes. Available in Full, Improved Modified, Modified, Improved Cylinder, Cylinder, Skeet 1, Skeet 2 and X-Full Turkey constrictions. Whether shooting clays, hunting waterfowl or woodland game, we have just the standard choke to suit your needs.