rOtring Tikky Graphic Fineliner Pens, 0.7mm & 0.5mm & 0.3mm, Black Ink, 3 Count Three fine liner pens include tips 0.3mm, 0.5mm and 0.7mm Free ink technology for a constant and consistent line quality and long usage Ink is pigmented for smooth use and water-resistant for long-life drawings Ink level window shows amount of ink left in reservoir Black ink is suitable for drawing, writing and sketching