Quality & value are 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. These Zebra refills are designed to complement & 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.