Square Stainless Steel Crystal Fire? Plus Burner Insert and Plate Kits?can be used for custom-built fire pits or your own outdoor fire feature to complement your landscaping?project. A no-flange edge and undermount installation?are concealed by fire media to highlight the gorgeous dancing flames. All burners have a higher BTU capacity and upgraded burner construction for a brighter, taller, fuller, more yellow flame. With just the push of a button, a beautiful clean-burning fire appears atop a bed of tempered fire glass gems.