A Bock #6 nib unit with an Architect grind. Architects produce fine down strokes with broader cross strokes. This is achieved by grinding the tipping to an angled edge that comes in contact with the paper. Because of this Architects are best ground to your specific writing angle. They are more sensitive to rotation and varying writing angles, so they may not be suited for everyone.
Note: Nibs may have a lead time of up to two weeks. Please keep that in mind when ordering