These exceptionally smooth-writing ball point refills are from Schmidt, THE name when it comes to refills. The difference that these refills will make in your pen’s feel is simply amazing! The 9000 refill utilizes a specially formulated ink that has a lower viscosity than regular ballpoint ink. This creates an ultra smooth and easy feel as the writing tip glides across the paper. This special refill dramatically changes the way your ball point pen writes. Essentially giving it close to a roller ball feel, but with the convenience of a ballpoint. You really have to try one to experience the difference, we promise you will be hooked! These refills are for pens that take a Parker-style refill. 1mm ball point which is a medium. Available in black or blue.