The MITCO .55-60W is a Delavan oil burner nozzle. It is used in HVAC systems for efficient fuel combustion. This nozzle has a flow rate of .55 GPH and a spray angle of sixty degrees. This combination maximizes heating efficiency. Made from 100% solid brass, it is durable and long-lasting. The nozzle includes a semi-green cap for easy identification. This is a direct replacement for many oil burner parts. It enhances performance in heating systems.