Lennox - 12M20 38LBF - 38" Solid Ribbed Extruded Doors - Black - Used for Lennox fireplace models: LBC-3824 , LBC-3824-H , LBR-3824 , LBR-3824-H and Superior fireplace models: LBC-3824, LBC-3824-H, LBR-3824 and LBR-3824-H - Part # / Catalog #: 11M72, 11M76, 11M70, 11M74, 042803, 066973, 042801 and 066971 - Please check year of manufacture. For Superior fireplaces, any that were manufactured before August 2000 require a track kit. For these units, we offer this same door with the track kit as one item.