Schneider Topball 850 Rollerball Pen Refills, Blue Ink, Box of 10 by Schneider Fits majority of rollerball pens which do not take proprietary refills. Smooth-rolling ceramic ball for neat, even lines "Capless-Quality" - won't dry out even without the cap 0.5mm fine point, Blue ink, Sold As 1 Box of 10 Refills Made in Germany