Karcher Universal 15" Surface Cleaner for Pressure Washers:Works in tandem with your pressure washer (up to 3200 PSI) to quickly deliver professional-level cleaning without splash backCleans an area 15" wide with 2 spinning nozzles instead of 1, reducing your cleaning timeEliminates streaks by keeping the nozzles at a fixed height from the surfaceCleans vertical surfaces including garage doors and home sidingIdeal for use on sidewalks, driveways, decks, siding, doors and moreKarcher surface cleaner attaches quickly and is easy to use