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 & value is paramount to the products Zebra manufactures. Every product undergoes vigorous quality assurance testing to guarantee writing performance & maintain the standards Zebra customers have come to expect. Zebra offers a selection of refills & accessories to complement & 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.