These Bic Cristal Ballpoint Pens feature a durable tungsten carbide ball mechanism and smooth oil-based ink for reliable, everyday use. The medium 1.0mm tip produces a thin 0.4mm line for elegant handwriting and detailed sketching. The hexagonal barrel includes a cap and end plug that matches the ink for easy identification. This assorted pack contains 10 pens with 4 blue and 2 each of black, green and red.