Produces clean, vibrant lines to get your writing noticed. Acid-free, archival quality ink for is perfect for important documents. Zebra™ delivers high-quality in a name you can trust. Quality and value is paramount to the products Zebra™ manufactures. Every product undergoes vigorous quality assurance testing to guarantee writing performance and maintain the standards Zebra™ customers have come to expect. Zebra™ offers a selection of refills and accessories to complement and extend the life of the most popular Zebra™ writing tools. The steel ballpoint F-series uses smooth, easy-glide ink for a more controlled writing experience. Refill Format: Standard Ballpoint; Refill For Series: Zebra™ F-301™ Ballpoint Pens, F-301A™ Ballpoint Pens, F-301™ Ultra Ballpoint Pens, F-402™ Ballpoint Pens, F-701™ Ballpoint Pens, Spiral Ballpoint Pens; Refill Ink Color: Black; Color Family: Black.