PARKER QUINKflow  Ballpoint Pen Ink Refill, Medium Tip, Blue, 1 Count Ink refill designed for PARKER ballpoint pens PARKER QUINKflow ink offers consistently smooth writing on paper Beautifully pigmented ink captures your thoughts in color Medium tip for everyday writing All PARKER ballpoint refills are certified ISO 12757.2 and comply with Documentary Use standards for the handling and storage of documents during long periods of time. Reliable PARKER QUINKflow ballpoint pen ink refills make writing a pleasure. Refill makes it easy to replace ink when it's time to refill or swap out ink colors.