Parker Qunik Navigator Rollerball Pen Refill (Ultra Fine) – Blue Roller Ball Refills(Navigator Technology-Conetip) Blue And Black Refills Available As Fine(0.5Mm) / Medium(0.7Mm) and Ultra Fine Navigator 0.5Mm-Needle Tip Ink refill designed for Parker Rollerball Pens Paper Quink Ink offers fluid and reliable writing on paper Beautifully pigmented ink captures your thoughts Ultra fine tip for your everyday writing