Karcher's 15 inch 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 inch wide with two spinning nozzles instead of one, reducing your cleaning time, and eliminates streaks by keeping the nozzles at a fixed height from the surface. Also cleans vertical surfaces including garage doors and home siding. Quick connect for compatibility with a wide range of electric pressure washers. Get pro cleaning results with the help of Karcher's 15 inch surface cleaner Karcher Surface Cleaner 15-in 3200 PSI Rotating Surface Cleaner for Gas and Electric Pressure Washers in Black | 8.641-035.0