This model was created in Zbrush and has a polygonal geometry. The model's geometry is mesh-based and is not in Rhinoceros Nurbs format. It was imported into a Rhino 3dm file, obj and stl for printing.
ZTL (Zbrush, filesize: 2.38 MB), OBJ (OBJ, filesize: 18.1 MB), 3DM (Rhinoceros 3D, filesize: 5.81 MB), STL (Stereolithography, filesize: 8.12 MB)