Crio 20ga. Flush Choke Tube. Whether you are on the hunt for small woodland game, shooting clays, or out in the cold hunting waterfowl, we have the crio choke you desire. These 20 Gauge Benelli Crio flush choke tubes have a nickel plated finish and are available in Cylinder, Improved Cylinder, Modified, Improved Modified and Full constriction.Specifications: Choke Tube Series: Crio System Choke Tube Type: Flush Finish / Color: Nickel Gauge: 20 Gauge