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 refills complement and extend the life of the most popular Zebra writing tools. These refills are designed to complement Zebra's G-750, G-450 and G-301 gel pens. Enjoy a smooth and skipless writing experience provided by easy glide gel ink performance. Refill releases a smooth ink flow producing clean, crisp lines. Vibrant gel ink will assure your style gets noticed. Zebra™ delivers high-quality in a name you can trust. Refill Format: Standard Gel; Refill For Series: Zebra™ JK G-301 Gel Ink Pens; Refill Ink Color: Black; Color Family: Black.