BIC Classic Cristal Ballpoint Pens - Medium Pen Point - Black - Clear Barrel - Metal Tip - 10 / Pack Cristal Ballpoint Pens feature a clear barrel so you can see the available ink supply and a roll-proof, hexagon-shaped barrel for comfortable, controlled writing. Design includes a ventilated cap and brass medium point with tungsten carbide ball. Cap color matches ink color. Stick pen delivers long-lasting dependability and smooth writing and writes with consistent, sharp, effortless lines. Ballpoint pens are nonrefillable.