Willow Natural Vent Natural Gas Logs offer 6 of the most impressionable, realistic, and detailed logs for the modern consumer. These decorative logs simulate a natural wood-burning fireplace without the hassle or mess of a real wood-burning fireplace. Conversion to LP is made possible with an LP conversion kit (sold separately). Includes an accessories start-up kit (vermiculite, glowing ember fibers, and decorative lava rock).