Erie Tools 21" Vehicle Undercarriage Surface Cleaner 4000 PSI 4.0 Orifice 3/8" Quick Connect Plug for Power Pressure Washer Professional trigger gun with 3/8 QC Plug inlet - Dual 25 Nozzles - 4.0 Orifice Size Max Temp: 194 F - Max working pressure of 4000 PSI - Easy to handle and maneuver Heavy duty rotating assembly - 7" clearance height needed - Covers approximately 21" wide area Can be used with hot or cold water - Resists rust & corrosion - Sturdy & durable construction Removes road grime, fuel and oil contaminants, snow sludge and ice etc.