Kärcher FJ6 Foam Jet Nozzle with 0.6 L Capacity Foamer for Pressure Washer Accessory. The Kärcher FJ6 Foam Jet Nozzle is being used here with meguiars gold class car shampoo. If you use the meguiars gold class car shampoo neat in the Kärcher FJ6 Foam Jet Nozzle you get really thick foam but it goes through it very fast which means you have quick coverage of pretty much any vehicle. Using the Kärcher FJ6 Foam Jet Nozzle makes cleaning your car considerably quicker. I think I paid about 12 quid for it and it’ll save you about 30 minutes a pop everytime.