Blue Flame, Multi-Functional Gas Valve, Fits 1/2 Gas Lines, 3/4 inches Throat, Can Be Preset Prior To Installation For Wood Logs, 22,000 BTU’s, Small Artificial Log Sets, 44,000 BTU’s, Large Log Sets & Fire Pits, Up To 270,000 BTU’s, Simply By Adjusting The Set Screw With An Allen Wrench, Included.