Product details:

The Opus 88 Jazz Clear fountain has a see through body so you can easily see the ink level in the pen (and it holds a lot of ink!). The metal clip and ring on the barrel are silver color, which matches nice with the clarity of the pen. Equipped with eyedropper filling system and center bar to regulate the ink flow. This is usually only available on high end eyedropper fountain pens. The pen can be filled with the included eyedropper and holds 2ml of ink. Opus 88 has been manufacturing pens for many companies and decided to use the gained experience by producing it’s own pens under the Opus 88 brand.