It makes soft snow foam, fun and simply. It works with any pressure washers, small and big are all working ly. It saves water, It's eco-friendly. It's touchless car wash, it saves your time and energy. The thick foam suds melt rods and dirty on paint, thus it reduces swirl marks and scratches. Applicable pressure washer model: for YILI Series How To Use: Put the shampoo or wash powder into the bottle. Fill the water into bottle,make sure the proportion of shampoo and water is correct! You'd better use warm water(not hot) to help make more foam. Shake the foam to make the shampoo Dissolve and more foam. Connect the bottle to foam unit. Connect the foam to car washer and then you can use it! Capacity: 750ML Colour: white Material: plastic Package Contents: 2 x Car Soap Sprayer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.