The American Outdoor Grill (24-B-20) replacement main burner valve is constructed of durable cast brass and fits all American Outdoor Grill L-Series and Pre 2015 gas grills (any size). To install, simply detach control panel, unscrew the current valve and replace with new. Installation takes less than 15 minutes. Sold individually. 24-Inch AOG Grills require two(2) electrode igniter assemblies, while the 30-inch and 36-inch models require three(3) main burner valves.