Duraflame 2.5 lb 1.5-hr Firelog (6 Pack) Robust flames that burns 80% cleaner than wood, fire log Lights quickly, Full flames In less than 5 minutes that last over 1.5 hours Use in an indoor, open hearth fireplace or outdoor fireplace or fire pit Ul approved safety classification for use in ul-listed Factory built fireplaces Chimney safety Institute of America accepted product