Pentel EnerGel X Rollerball Retractable 0.7mm Tip 0.35mm Line Black Ref BL107-A [Pack 12]

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 super quickly, it's appreciated by right and left-handed writers alike, as it produces smudge-free results on paper or hands.