The Kärcher 9.633-508 Basic Box is a practical accessory kit designed to enhance the cleaning capabilities of your pressure washer. This yellow plastic set is compatible with K2, K3, K4, K5, and K7 models, making it a versatile addition for those who want to maintain their equipment and surfaces more effectively. Inside the box, you will find the FJ 10 foam nozzle, which allows you to apply a thick, dense foam for a gentle yet efficient cleaning process. To get you started immediately, the kit also includes a one-liter bottle of universal cleaner detergent, providing everything needed to tackle various grime and dirt tasks around the home or vehicle.