This Zebra Ballpoint Pen Refill Fine Black provides black ink, fine point for reliable everyday writing and refill replacement. It is suited for Zebra Ballpoint and helps extend the life of compatible pens or markers. A dependable choice for office, school, reception, home office and commercial stationery supplies, For Zebra Ballpoint Pen F701, F301, F301 Ultra, F402, F605 and Notus 500.