1. Big Mouth Foam Cannon: Pour soap liquid to bottle easily, no waste; Our design has an extra-wide neck to prevent that problem. Heavy duty foam core makes foam more dense and thick.2. Adjustable Nozzle for Thick foam and Spray pattern: Mix detergent and water and connect the cannon to the pressure washer. Turn the top knob right (-) to get the thickest mixture; Adjust the spray nozzle to get a proper sprinkle pattern. The nozzle holder allows the user to rotate 360-degrees to control the dispersing direction.