The PILOT Parallel Pen is a cartridge-fed calligraphy pen built around a nib made of two parallel metal plates rather than a conventional slit nib. Ink flows evenly between the plates, giving crisp edges and clean hairlines. Turn the pen to the narrow edge for a fine monoline stroke, or use the full width for broad-edge lettering. Touching the nib of one Parallel Pen to another loaded with a different colour blends the two inks directly on the page.