Hardly used set of Chamber mates to convert a 12 ga. to 20. ga.  One slightly used, the other not used.  I primarily used one at a time for bird hunting over a German short hair.  One barrel 20 ga. for close in, the other 12 ga. for distance.  Obviiously for a SxS or O/U.  Had them for a long time and do not hunt anymore.  Payment via Paypal or Venmo.  Shipping $8.90