... Shell: Cast Iron2. Radiant part: cordierite honeycomb(ceramic) plates with black processed rare-earth catalyst coated3. Nozzle: brass4. Up cover ... other's work, but if there’s any small problem with the gas burner, the curing will be stopped.Heating ... like combustion chamber, blower….Low cost of equipment, martched with accessories,only need temperature controller and pressure instrument,connect them ...