Genius Pro Artillery 3D Printers Auto ABL Leveling 220*220*250 mm Build Volume 0.4mm Volcano Nozzle Ultra-quiet Stepper Motor 250mm/s moves Artillery Genius Pro : Printer complete assemble size is 430*390*590mm, with the build volume of 220*220*250mm as the same of Genius. However, the different is, Pro has our own technology of ABL auto leveling in the extruduer ,with our new mainboard