This firestarter is made from recycled biomass product such as wood sawdust, ground tree nutshells and blended wax. Classified C/UL/US listed. Processed solid fuel for use in factory-built fireplaces 7L47. For United States this firestarter has been tested by Underwriters Laboratories Inc. for use in factory-built fireplaces. Use in smaller appliances may be hazardous. Unconditional guarantee.