Fast, easy lighting. Burn up to 4 hours (Burns up to 4 hours. Variations in fireplace and climatic conditions may slightly alter duration of burn). Simple, no mess. Clean burning (15th emission inventory conference, New Orleans, May 2006). 6-4 hours. Burns cleaner than cordwood. Quality guaranteed or your money back. Classified UL listed. Processed solid fuel for use in factory-built fireplaces 7L47. For product questions or concerns, contact us at 1-877-846-9949. This firelog is made with recycled biomass products such as hardwood sawdust and ground tree nutshells. Product of USA.