This is a New (10) Rain Bird 4VAN Sprinkler Spray Nozzle 4' Radius Adjustable Arc (330°). The Rain Bird 4VAN nozzle is designed for precision irrigation in compact or irregularly shaped zones. With an adjustable arc range from 0° to 330°, it allows you to tailor the spray pattern to fit corners, curves, and tight beds without needing multiple nozzle types.
eBay