Lennox - H7570 / LB-98317D / 164680A - Herringbone Pattern - Back Refractory Panel - Used for Lennox Fireplace Models HC-36-H / HCI-36 & RD-36-H / RDI-36-H and Marco Fireplace Models D36TCF , D36TCFI, D36THC & D36THCI and Superior Fireplace Models HC-36-H, HCI-36-H, RD-36-H & RDI-36-H (Part / Catalog #'s 792805A, 792806A, 792811A, 792812A, 85L39, 93L76, 84L84 & 84L86)