20GA. IC EXTENDED 1"
FEATURES:-Improved Cylinder Choke-Can be used on all Mobilchoke barrels-Made of high quality steel, they are of a great stress resistance due to heat treatments-The end of the choke is identified by a colored alloy stripe for fast & easy indication of the costriction-Fits Beretta Silver Pigeon I (field models), A300 Outlander, 687 (field models), Some 391 Models