The Parker blue F 1950322 rollerball refill offers the smooth feel of liquid ink in a fine (F) tip for Parker rollerball pens. Loaded with intensely pigmented Quink blue ink, this rollerball refill provides a precise 0.5 mm line without requiring pressure on the paper. The vibrant blue tone stands out elegantly in any notebook. It's perfect for those seeking fluid and detailed handwriting for everyday work.