Karcher 2.633-007.0 Telescopic Extentension Piece Set for Window Vacuums The Karcher Promise: Cleaner. Quicker. Best-in-class cleaning performance Telescopic extension for the Window Vacuum / Power squeegee enables you to clean overhead windows Adjustable joint allows you to select the best working angle Interchangeable and washable cloth head to apply cleaning solution Easily attaches to the WV50, WV50PLUS, WV55, WV60, WV60PLUS and WV65PLUS models of Window Vacuums