Pentel Gel Ballpoint Pen Hybrid EK105, 0.5mm Tip, Blue Ink (EK105-GC) Pentel Gel Ballpoint Pen Hybrid EK105, 0.5mm Tip, Blue Ink Smooth Gel Ballpoint Pen, Energel from Japanese stationary brand Pentel. Hybrid is available for 3 colors, black, red and blue ink Model: EK105-GC