Width of stroke is 1.5 mm Refillable. By using Pilot Parallel Pen, with two ink cartridge, you can achieve beautiful gradated lettering. It can effectively be used for drawings, calligraphy illustrations, name cards, menus, gift cards, labels, signatures & musical notations etc. Style, beauty & originality all at your figure tips. Master the techniques of Pilot Parallel Pen & you will always be able to express yourself creatively. The Pilot Parallel Pen features two parallel plates on the nib point for beautiful, sharper lines.