ASTM-A653 CS Type B Galvanized Steel, 30GA G-30 Coating LFQ Chemical Treatment
Assembled with C-115 2/16 zinc coated steel rivets
244: An 1/8″ hem on both collar and register openings. A Royal plaster frame may be used to hange the boot in a ceiling mount.
244F: A 1″ Outboard flange around the perimeter of the register opening with a 5/8″ drywall edge. Royal boot rails may be used to hang the boot in a ceiling mount.