Medium Tip – Blue Ink - Standard size ceramic tip roller ball refill by Scriveiner Liquid Ink Refill – Gives you the feel of a fountain pen with the convenience of a ballpoint Superb Quality Ink – The Medium tip provides a superb overall writing experience Made in Germany – Designed for Scriveiner Pens Schmidt 888 Size – Scriveiner rollerball refills fit the vast majority of rollerball pens that use a standard size refill Customer Satisfaction Guarantee – If you are not satisfied we will refund or replace to make things right – whichever you prefer Scriveiner Rollerball Refills 4 Pack of Superb Quality Refills. Designed to allow you to get the best out of your Scriveiner pen. Our liquid ink system gives a better writing feel than gel-based pens. Made in Germany. Schmidt 888 size means that these refills will fit the vast majority of rollerball pens that use a standard size refill.