Three ceramic pistons, brass linear pump head. 1500 RPM reducer between engine and pump. Automatic RPM regulation. By-pass with safety valve. Suction and delivery valves s/s. 13 HP Honda GX 390 unleaded gasoline engine. Integrated detergent suction with external suction probe. Pressure regulator. Pressure gauge Glycerin. Suction hose with check valve (optional). Heavy duty steel frame.