Fine craftsmanship with years of industrial kiln building experience make Crucible your choice! If you want quality, durability, a 1-Year warranty and the industry's best customer service, then get a Crucible Kiln. Even-firing Crucible Kilns are equipped with heavy duty venturi burners for maximum efficiency and control. Optional temperature limit/soak controllers enable precision firings. All parts are selected for a long life even with daily cone 10 firings. Natural gas models are shipped unless bottled gas (propane) is specified. All 12 cubic foot and larger Crucible Gas Kilns are priced with Auto Ignition and Baso Safety System.