Sure Heat Mountain Oak Vented Dual Burner Log Set for Natural Gas Fireplace, 18-Inch Six highly detailed, hand painted ceramic logs traditionally stacked on a tiered grate realistically recreate the look of a mature fire in your fireplace Equipped with an innovative u-shaped dual burner, Pan, Grate, Shale, Glowing Embers and connection hardware. This is a match-light style vented unit. On/Off valve not included. Fits all fireplaces with minimum dimensions of 28-inch front width; 15-inch depth; and 21-inch back width 50,000 btu's Requires an open and working flue