Wash nozzle designed for a 1/4" (6.35mm) quick coupler. Ideal for quick exchange of spray nozzles and spray guns. Its wide spray pattern disperses the water pressure over a large area and is recommended for rinsing and moderate washing. Uses: Washing down aluminum siding, cleaning windows, washing vehicles, spraying sidewalks, driveways and patios. Connects to all of the most common pressure washer equipment in the industry. 4,000 PSI.