Molded with an exclusive fiber enhanced refractory ceramic mixture, these handcrafted logs showcase the crisp bark detail, as well as the unique look of the log sets. These Peterson Real Fyre Logs can be used with commonly available fire pit ring burners. Allow a minimum of 3-6 inches clearance from the edge of logs to the wall of fire pit. All logs have a flat, unfinished back or bottom. For use with vented gas log systems. This log set does not include a burner system. It must be purchased separately.