Fits Beretta Silver Pigeon I (field models) A300 Outlander 687 (field models) Some 391 Models - The Choke tube family has been studied in order to satisfy all the hunters needs. - For this reason Beretta has been develop four new constriction: Extra Full Light Full Light Modified and Skeet USA. - Extended Hunting Tubes fit on all MOBILCHOKE barrels. - Made of High Quality Steel due the heat treatment they have great stress resistance. - They are blued and have an antireflection coating. - Emergency tube tool is available. - Available in four gauges: 12 20 28. Made in Italy.