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. Designed to complement Zebra's F-301, F-402, F-701, F301 Compact and 301A 0.7mm ballpoint pens.