BBQGuys Signature 18-Inch Stainless Steel Double-Ring Natural Gas Burner W/ 1/2-Inch Inlet - SS-FR-18. SS-FR-18. Fire Pit Rings & Burners. Made of 304 stainless steel our 18-inch natural gas fire pit ring burner is not only elegant to behold but also very durable. It can withstand extreme temperatures and harsh weather without any damage or discoloration. It will last for many years to come! The double concentric ring design increases the overall diameter of the burner allowing for a truly realistic and evenly distributed flame. Furthermore the burner holes have been drilled not punched which means no whistling noises are produced. Our burner also comes with a convenient 1/2-inch gas inlet. Gas hose and connections are not included.Please note the burner diameter should be at least 6 inches shorter than the interior dimensions of the fire pit it is to be used in. To be used with 2 - 4 inches of fire glass not included.Our Fire Glass Calculator can help you calculate how much glass you need for your custom fire pit....