This side burner is factory assembled for use with natural gas for use in built-in islands. It includes two individually controlled valves within a recessed top for easy cleaning. Each burner is delivers 17,000 BTU/hour, with a low fire simmer setting. Two 3/8-inch diameter zig zag stainless steel grates provide a sturdy platform for your pots. The side burner includes metal knobs, battery powered (9-volt) push-button electronic ignition, and a matching stainless steel cover. Made in the USA by Rasmussen Gas Logs & Grills, a fourth-generation, 102-year-old family business.