Hourley Pressure Washer Undercarriage Cleaner, 4000 Psi,, Degree Angled Wand. Come with 13 inch pressure washer undercarriage cleaner with 4 nozzles and 2 casters. 1/4" quick connect 13 inch pressure washer extension wand and 13 inch 45 degree pressure washer angle wand Help quickly and easily clean the bottom of vehicles, boats, and RVs. Easy to remove dirt, fuel and oil contaminants. Pressure range: 1500 PSI to 4000 PSI. 2500 PSI or higher will have the better result. TIPS: Please ensure that the working pressure of the pressure washer is above 1500 PSI. Easy to use: connect the curved wand to the undercar cleaner, then connect the straight wand to the curved wand, then connect them to the pressure washer gun, control the washer gun to push the cleaner into the bottom of the car for cleaning. Good Service: If any problem, please feel free to contact us, Prince Team offer replacement and full refund services.