Myard 13" Country Oak style INDIVIDUAL Fire Gas Log for Natural Gas/Liquid Propane Fireplace HEAVY DUTY, not foamed alumina ceramic or glass (light & fragile). The logs are steel reinforced, plus produced with lave granules plus significant heat ceramic refractory which is employed to check rocket machines. Designed to be Used With Vented Gas Log Systems. Highly detailed, hand painted refractory firelogs. By 3 generations of designers, logs are designed, handwork manufactured in CA USA. Type: MFL 13CO INDIVIDUAL log only. The log you will receive might be a little different from the one in photo, since it is hand-made. Approved Certification is through OMNI TESTING LABORATORIES. Indoor gas logs sets have limited LIFETIME WARRANTY by manufacturer.