Pentel Energel XM Retractable Gel Rollerball Pen 0.7mm Tip 0.35mm Line Red (Pack 12) - BL77-BOThe Red ink BL77 Energel Retractable Roller Ball Gel pen is for everyday use. It incorporates a generous smooth rubber grip for added comfort and an attractive metallic barrel finish. It is a 0. 7mm tip which gives approximately a 0. 35mm line width when writing. It is a low viscosity liquid gel ink allowing a smooth flowing and quicker drying ink than normal gel ink. Because the ink dries quickly it is especially suitable for left handed writers.