Silicon Gel Ear Seals for Gulf Coast Avionics branded headsets. These will work with the GCA-4T, GCA-6T, GCA-4G, GCA-6G, GCA-ANR and ANR/BT headsets.
These will NOT work with the GCA-9T headsets or GCA-ANR/II headsets. (Please see part number QFR-S for those headsets.)