FJ 10 C Connect 'n' Clean Foam Nozzle with Ultra Foam Cleaner. The quick-change system for applying detergent allows for rapid switching between different detergents with a single click. The detergent dosage can be easily adjusted from the foam nozzle (yellow button). The spray level can be adjusted as needed. Suitable for all Kärcher consumer high-pressure washers in the K2–K7 categories.