Like all Parker™ pen refills, these Retractable Gel Ink Roller Ball Pen refills offer a quality writing experience. The ink dispenses flawlessly and the conical roller ball point lays down a bold, dark line. Refill Format: Standard Gel; Refill For Series: Parker™ Retractable Gel Ink Roller Ball Pens; Refill Ink Color: Black; Color Family: Black.