M819A: Power:1.2HP Volt: 220-240V/50HZ Max Air Pressure: 200bar Max Fluid Delivery: 2.1L/min Nozzle Size: 0.019" Weight: 29kgs M819B: Power:1.5HP Volt: 220-240V/50HZ Max Air Pressure: 200bar Max Fluid Delivery: 2.5L/min Nozzle Size: 0.021" Weight: 29kgs