An oil-burner nozzle made by Delavan, the nozzle is a 0.85 Gallon per hour with a 45-degree angle and W spray pattern. Made in the United States. ( See manufacture information here )

Details

• Size : 0.85 GPH 
• Angle: 45 °
• Spray Pattern: W (Semi-hollow)
• Spray Pattern Details: Type W “ ALL PURPOSE “-nozzles are neither truly hollow nor solid. These nozzles frequently can be used in place of either solid or hollow cone nozzles between 0.40 and 8.00 GPH, regardless of the burner’s air pattern. The lower flow rates tend to be more solid.