Ceramic fiber firing chamber (muffle) for the 120 volt QuikFire 6. The firing chamber includes an embedded element. Before ordering a new muffle, check the element connectors. If one has burned off, you can usually repair the muffle without replacing it. Merely replace the element connector. Ships in a 16″ x 16″ x 14″ (406 mm x 406 mm x 355 mm) carton.