The 170mm Replacement Suction Lips are quick and easy to change, simply pull the old ones out and slide the new ones into place.
The (170mm) Window Vac replacement blades are suitable for use with the WV 2 - WV 5 models.
Worn blades should be changed to ensure effective cleaning
Karcher pull off lip - 170 mm WV50 2.633-104.0 , 26331040