Car wash cleaning guns , spray gun, foam gun

Picture show                                                        

Working principle                                                  

• Using high pressure water to draw detergent into gun and produce high-density foam . Spray foam on the object for while then the dirt will be resolved . finally use high pressure water to clean

Convenient to use                                                

• Connect to my high pressure washing machine
• The gun could spray foam with long distance than other foam gun 
• Could spray more foam