Opus 88 Koloro Red fountain pen
The Opus 88 Koloro Demonstrator is a large fountain pen made of clear transparent acrylic (length closed 147.5 mm). The pen is equipped with a steel nib available in different line thicknesses. The clip is matte black. The pen needs to be filled with a pipette (so-called eyedropper), as is the case with some Japanese fountain pens. Connected to the rear cap is a rod in the barrel with a gasket at the other end with which the feed and the reservoir can be separated from each other. Slightly loosening the rear button allows the feed to be provided with ink. Again tightened the two compartments are separated and the large ink supply (about 3 ml) is safely stored.