Opus 88 Bela Green fountain pen, green resin barrel and cap with an ink window close to the section in green acrylic. The pen features a steel nib and eyedropper filling mechanism (eyedropper is included) and a black coated clip with Opus 88 branding on it. 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. The Omar pen can be used posted, but it makes the pen very long as it posts rather high. Posting this pen is not recommended. 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.