Refills for the Pilot G2 Premium Gel Roller Pen. The G2 premium gel ink pen is the ultimate pen for the everyday overachiever and the #1 selling gel ink brand in America. G2 writes smoothly comfortably and has been proven to last longer than the average of competitive gel ink brands. Available in four point sizes more than 25 vibrant ink colors and a variety of barrel design options there’s sure to be a G2 perfectly suited to you. Point size: 0.5 mm; Point Type: Extra Fine; Ink Color(s): Black; Ink Type: Gel; 2 Count of gel ink refills.