This product is a 18" Heavy duty warp-resistant steel with high temperature black paint. Double Fire Pit LP Propane Gas Burner Kit from Stanbroil factory.<br/> Fire Pit Rings are the quickest and most economical way to build a fire pit. Create the feeling of a world class resort in your own back yard with this Fire Pit Burner Rings. Enjoy the dancing warmth of a dramatic and luminous campfire flame while gathering around your fire pit with family and friends. <br/> Heavy duty warp-resistant steel with high temperature black paint material will remain trouble free in the outdoors. Fire rings kits are designed to be used only in an outdoor fire pit using propane fuels and also be used for gas logs, lava rock, fire glass etc. <br/> Flame height is directly related to the BTU output of the unit. For maximum flame height, allow for BTU 147,000.