Surface cleaner for pressure washer: The surface cleaner is installed with 3 wheels that help power washer surface cleaner move easily and flexible on large area. Flexible bristle skirt protect adjacent surfaces and resist water splash out while working. Working pressure is up to 3600 PSI. 1/4” standard quick connect fitting. Dimension of the surface cleaner is 15” X 15” X 3.9”..Application: The 15" surface cleaner is much more efficient than normal pressure washer spraying nozzle. Perfect for cleaning large area like driveways, patios, rooftops, walls and sidewalks..Pressure washer extension wands: The length of each wand is 15”. 2 wands are connected with thread to avoid leakage at the connection. The end of the wand is 1/4" quick connect fitting, suitable for most pressure washer attachments with 1/4" quick connect..Replacement nozzles: 2 additional nozzles are attached for replacing the original nozzles when seriously blocked. To avoid the nozzles blocked, please use water inline filter. And when the nozzles are blocked, you can use needles to remove sand or other debris in nozzles and rinse with fresh water..Package include: 1-piece 15 inch pressure washer surface cleaner with 3 wheels, 2-pieces power washer extension wands and 2-pieces power washer replacement nozzles.