Quality and value are 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. These Zebra® refills are designed to complement and extend the life of Zebra® F-701 ballpoint pens. 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-Series; Refill Ink Color: Black; Color Family: Black.