For a smooth writing experience and fine strokes Designed for the EnerGel pen. Combines the best qualities of liquid and gel ink. Medium point is great for everyday writing. 0.7 mm tip size. Blue ink. EnerGel Pens part of a large selection of office supplies. EnerGel (TM) Pen Refills, Medium Point, 0.7 mm, Blue Ink, Pack Of 2 is one of many Pen Refills available through Office Depot. Made by EnerGel.