The Pentel brand name is well known these days, & this is in no small part due to the fine array of items that they currently stock. These pens are in themselves worthy of note as they come complete with high quality plastic tips which allow for smooth, legible results & the barrels themselves are smartly formulated, ensuring comfort. The inks included are water-based, ensuring effortless coverage. These items boast 0.5mm nibs which write a wonderfully sleek 0.25mm line width. Pentel Blue Energel (pack of 1) BL117A-CX Comfortable design 0.5mm nib writes a 0.25mm line width Water-based ink is easier to remove from clothing