Designed to meet the rigorous demands of the cleaning professional, the SIMPSON Aluminum 4200 PSI at 4.0 GPM HONDA GX390 with CAT Triplex Plunger Pump Cold Water Professional Gas Pressure Washer frame is crafted of aircraft grade aluminum, making it lighter in weight than most steel frame gas pressure washer designs. This gas pressure washer is perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal and all other professional cleaning services. The pressure washer is designed for optimum performance in the harshest environments. Get the job done right with this durable gas pressure washer!