Pentel EnerGel XM Retractable Permanent Ink Gel Rollerball Pen 0.5mm Tip 0.25mm Line Black (Pack 12) - BLP75-AX

With its revolutionary low viscosity liquid gel ink, the EnerGel formula is quicker drying and smoother flowing than ordinary gel ink, giving a similar sensation to liquid ink. Because the ink dries quickly it's appreciated by right and left-handed writers alike, as it produces smudge-free results on paper or hands.