- Quality ink, quick drying and smooth writing- Tungsten carbide ball, perfect sphere and very resistant- Medium point: 1.0mm, line width 0.4mm- Hexagonal barrel for comfortable handling- Clear barrel for visible ink supply- Cap and plug color matches ink color- Ventilated cap compliant with ISO 11540 / BS 7272-1 standard- Long lasting product: up to 2 kilometers writing length- Light: designed and manufactured with just the right amount of raw materials- PVC free product