This Delavan Nozzle is used with Clean Burn furnace models CB 90 AA, CB 90 AH, CB 86 AH, CB 1400, CB 1500, CB 1501, CB 1750, CB 1800, CB 2500, CB 2501, CB 2800, CB 3500, CB 2000, CB 4000, CB 140 and Saturn 140 & 230 in standard application of used motor oil. Delavan nozzles are commonly used with a variety of waste oil applications and furnace manufacturers. They are sna - siphon air atomizing nozzles 9-5 Clean Burn part # 32000. The Delavan stamp reads 30609-5