The Opus 88 Koloro Black Fountain pen is a specific model of fountain pen manufactured by Opus 88, a well-known Taiwanese pen brand. The "Koloro" line of fountain pens is...

The Opus 88 Koloro Light Blue Fountain pen is a specific model of fountain pen manufactured by Opus 88, a well-known Taiwanese pen brand. The "Koloro" line of fountain pens...

The Opus 88 Koloro Hot Pink Fountain pen is a specific model of fountain pen manufactured by Opus 88, a well-known Taiwanese pen brand. The "Koloro" line of fountain pens...

The Opus 88 Koloro White Fountain Pen is a specific model of fountain pen manufactured by Opus 88, a well-known Taiwanese pen brand. The "Koloro" line of fountain pens is...