H2001. J. Herbin Glass Pen.
These hand-blown glass pens feature elegantly spiraled tips designed to control ink flow, maximize time between dips, and produce a fine line. They work beautifully with fountain pen inks, calligraphy inks, sumi inks, and more. Simple to use and easy to maintain; just dip, write, and rinse clean. Tip can be smoothed with fine sandpaper (very carefully).