 The HD-R was built with an improved aluminum backbone for rigidity and had a maximum build envelope of 11”x 8”x 12” (1056 in³).The HD-R had a print resolution of .06mm (.002") and came standard with a .5mm nozzle or an optional .35mm nozzle.The first in the AXIOM line is made from extruded aluminum and injection molded polycarbonate parts.