Amerex Corporation has never purchased, received or used Halon 1211 as supplied by the suspect company mentioned in the FAA circular for use in the manufacture of our Halon 1211 fire extinguishers. The Halon 1211 that Amerex Corporation has used in the manufacture of our extinguishers has met all applicable specifications and requirements of UL [...]

Updated document comparing extinguisher ratings can be found in the Learning Center under Educational Documents.