Marine Grade Lifetime Warranted 316 Stainless Steel Gas Fire Ring Burner, featuring a double ring design with a central 1/2"³ inlet hub and plug which allows you to install the fire ring with flames up, or flames down (depending on your gas installation type); and also gives the ability to plumb through the fire ring for additional attached fire features. 18 Inch Marine Grade Stainless Double Fire Ring. Also known as the FR18. Works great with our EasyFirePits Gas Kits!Use with Natural Gas or Propane fire pit conversion kits and transform any existing wood burning fire pit into a gas burning one.Outdoor use only.