Get the A.O. Smith 18" Burner Assembly (NG) for your storage tank water heater. This brand new burner assembly is a perfect replacement for your old and worn-out one. With a power source of NG (Natural Gas), it is ideal for those who prefer a more eco-friendly heating option. Made specifically for A.O. Smith water heaters, this burner assembly has an item diameter of 18", ensuring a perfect fit. Don't settle for anything less than the best when it comes to your water heater parts. Upgrade to this A.O. Smith burner assembly for a reliable and long-lasting heating solution.