Compatibility: Adjustable pressure washer foam cannon applies to Nilfisk Gerni Series Car washer cleaning machine. Also applies to STIHLE RE98 RE108 RE118 RE127 RE128 RE163 Convenient and Effective: Mixing car wash and water, shake the foam bottle, it will produce soft fluffy snow foam, and spray to the part you need to clean. Then only use tap water to Rinse it clean. Protect Car Model: Snow foam lance attached to the surface of the car, the thick foam melt rods and dirty on paint, thus it reduces swirl marks and scratches. Adjustable: Top nut of the snow foam lance can be rotated to control the amount concentration of the foam stream. Rotating the nozzle can adjust the spray angle. Environmental Protection and Durable: Save water, all metal parts made by copper, all nozzle and connectors has rubber rings, bottle made by strong PA material, long time to use.