The Karcher 15" surface cleaner works in tandem with your gas pressure washer (up to 3200 PSI) to quickly deliver professional level cleaning without splash back. It cleans an area 15" wide with two spinning nozzles instead of one, reducing your cleaning time, & eliminates streaks by keeping the nozzles at a fixed height from the surface. Also cleans vertical surfaces including garage doors & home siding. Quick connect for compatibility with a wide range of electric pressure washers. Get Pro cleaning results with the help of Karcher 15" surface cleaner.