Patented feed system maximizes ink supply Ideal ink release extends pen life! Pilot's advanced feeding system releases just enough ink per stroke to ensure a long-lasting ink supply, as well as prevent skipping and ink blotches. Dimpled rubber grip for superior comfort and control. The color-coded, molded rubber grip and sleek metallic barrel is stylish yet professional. View window to monitor ink supply. Nonrefillable. Pilot Pens part of a large selection of office supplies. Pilot(R) V-Ball Grip(TM) Liquid Ink Rollerball Pens, 0.5mm, Extra Fine Point, Metallic Silver Gray Barrel, Black Ink, Pack Of 12 is one of many Rollerball Liquid Ink Pens available through Office Depot. Made by Pilot.