Note: Not suitable for garden hoses or water pipes. The pressure washer and foam gun cartridges are made of heavy-duty brass. The spray gun has an M22-14 threaded inlet connector. The foam gun has an adjustable 1/4" quick-disconnect fitting. A 3/8" swivel quick-disconnect is also available. A pressure washer with a pressure of 1500 PSI or higher is required for use, with a maximum pressure of 4350 PSI. The maximum temperature is 140°F. Capacity: 0.22 gallons/1 liter. The set of five nozzle tips features 0°, 15°, 25°, 40°, and soap spray patterns for a variety of uses. Upgraded Leak-Free Design: The upgraded heavy-duty brass neck with an O-ring prevents leaks. The high-pressure snow bubble gun can be adjusted to your specific needs. A knob on the top controls the water volume and foam thickness, allowing the foam gun to produce thick foam. Easy to Use: Pour the appropriate amount of liquid soap and water into the bottle to your desired ratio to create a thicker foam. Then connect the 1/4-inch quick-connect plug to the pressure washer gun. The adjustable nozzle allows for precise mixing and foaming. Turn the top knob right/off for the thickest mixture and adjust the nozzle for the desired spray pattern. Wide Applications: Ideal for car cleaning, window washing, driveways, roofs, and siding washing. Suitable for professionals, hobbyists, and just about everyone. Please note that this gun uses an M22-14 threaded connector. If it does not fit your pressure washer hose connector, please purchase an adapter separately.