Our pan burners are constructed from high-quality tube burners covered in a bed of sand. The logs rest on a sturdy 5/8 wrought iron grate above the sand and ember bed. Gas percolates up through the sand and burns beneath the logs. Our See-Through Burners feature three equal-length tube burners in a rectangular sand pan. Designed to fit most see-through and peninsula fireplaces, this three-burner system looks great from any angle. See-Through Burners fit these See-Through log sets Great Lakes See-Through, Tree House 7 See-Through, and Tree House 11 See-Through. Includes See-Through Burner, 5/8 inch Grate, Sand, Embers, Lava Rock, Flex Line and Fittings. Features Model # B3RSTHK18N. Fuel Type Natural Gas. BURNER ONLY Millivolt See-Thru Burner. UL Certified. Burners ship assembled for Natural Gas, LP Conversion Kits available. For use with LGLO18ST, LTH718ST and LTH1118ST by Empire Comfort System. Specifications Overall Dimensions 18 L . BTUs 75,000. Required Must Choose Log Set to Complete This Unit Not Included, Sold Separately 18-inch Great Lakes Oak See-Through 6 Piece Log Set LGLO18ST . 18-inch Tree House 7 See-Through 7 Piece Log Set LTH718ST . 18-inch Tree House 11 See-Through 11 Piece Log Set LTH1118ST .