National N Series Xs Air Burner For Light Oil Sealed in Burner and are stable with high excess air or up to 50% excess fuel. Suitable for high temperature and low temperature application such as Ceramic Kilns, HT, Forge Furnaces & Dryers. Dual- fuel model also available for LPG Natural gas Light and Heavy oil. Vary easy for maintenance and give very long life because of stainless steel inner parts.