Picture show                                                                               

This combination can make foam 

 This combination can spray water

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.Compare with other foam gun . My high pressure foam gun could spray foam more long distance and more foam . 

Convenient to use                                                                       

• just connect to my high pressure washing machine dont need other device .