Comes in a few varieties now, with single Z axis stepper The standard Ender-3 has a 0.4 nozzle, a print surface 235×235 with a Z of 250, the nominal print area is 220×220, but one can get prints to 230×230. Later versions have a few improvements to the Extruder, including a brass insert in the Extruder lever, because putting a few dozen spools through the printer if its in standard build will wear a slot in the lever and it seizes up.