Carlsons Choke Tubes Beretta Benelli Mobil 20Ga Matte Black 17 4 Heat Treated Stainless Steel Sporting Clay Improved Cylinder Choke Tube (25523) Multi Lens and carbon fiber components SISO CREW JESUS TUTU XS S and carbon fiber components Can be weighted or weightless 25% LONGER PARALLEL SECTION The Beretta Benelli Mobil 20Ga Precision Machined Sporting Clays choke tubes feature a 25% longer parallel section throwing more consistent patterns than conventional choke tubes Our sporting clays choke tubes are made from 17 4 Heat Treated stainless steel and precision machined to produce a choke tube that patterns better than flush mount choke tubes