Quil 9552 Blue Extra Fine Rollerball Refills - 2/pk aka Duratone 95 you are buying TWO 9552 Quill compatible RB refills: blue XF universal rollerball refill size; exact same configuration fits most capped rollerball pens; comparable refills: Schmidt 5285 and Private Reserve Ink 5285 length - 11.1 cm; will NOT fit a ballpoint pen bulk packaging