1. Upgraded Functions: Foam cannons for pressure washers range from 1000 PSI to 3600 PSI. The container bottle features a larger opening for easy filling and an extrawide neck to prevent cracking and leakage. The foam sprayer comes with a 1/4' container and a 1.5liter capacity. A larger capacity foam cannon allows for extended cleaning time and coverage. 2. Extra Alignment Nozzle: The foam gun for pressure washers includes an alternative 1.1mm foam cannon opening. If your pressure is below 1500 PSI, use the 1.1mm nozzle for thicker foam. For pressures above 1500 PSI, use the original nozzle. 3. Easy to Install: First, fill the foam bottle with soap and warm water to create thick foam. Next, connect it to the pressure washer gun or wand using the 1/4' quick connector plug. Finally, adjust the knob to your desired foam level—the foam blaster will distribute rich foam. The knob controls the foam output, while the nozzle adjusts the spray pattern.