The RYOBI 18 in. Gas Surface Cleaner is the ideal choice for hard surfaces like driveways, patios and sidewalks. This time saving accessory cleans up to 6X faster than a standard nozzle, with rotating jets that give you a large, streak-free cleaning path. The surface cleaner has a 1/4 in. quick connect that easily attaches to your pressure washer, allowing you to move quickly between jobs. The RYOBI 18 in. Surface Cleaner is compatible with most gas pressure washers between 3300 psi and 4200 psi.