Karcher WV 6 Plus Window Vacuum Squeegee - Also Perfect for Showers, Mirrors, Glass, & Countertops - 11 in. Squeegee Blade 1.633-512.0 - The Home Depot
The Kärcher Window Vac - its benefits and uses | Karcher Center Trafalgar
Karcher WV2 Premium Window Vacuum- Simple & Quick Window Cleaning | The Good Guys - YouTube
Kärcher 170mm Window vac suction head | DIY at B&Q