The stainless steel 3-tier ring burner is the perfect addition to your fire pit to get those billowing campfire-like flames. Three, 19 gauge 304 stainless steel, fire pit rings make up this triple tiered burner, boasting a total of 327,000 BTUs of heating power. This burner must be used outdoors in a well-ventilated area. Includes 18-inch ring burner, 12-inch ring burner, 6-inch ring burner