The ergonomic triangular barrel helps minimize writing fatigue by promoting proper finger placement and stops the pen from rolling in your hand. Dry-safe ink formula means the cap can be left off several days without ink drying out. Super-fine, .3mm line width. Dozen. (Black shown) Education Categories: School Supplies / Pens - Pencils - Markers / Pens. UNSPSC/NIGP Codes: 4412170100-61500000