Pilot G-TEC-C4 0.4mm Black Ultra Fine Roller Ball Gel Pen,BL-GC4-B( PKT 10 PENS)
PILOT REFERENCE : BL - GC4 - B. Another massive plus on these pens is that they are REFILLABLE. As you know we all get use to using a particular pen the way it feels and writes etc, then it runs out.