Pack of 12 Tombow Twin Tone Marker Set Bright Double-sided markers creates thick or thin lines with two tip choices - broad bullet tip for bold lines or extra-fine tip for detailed, precise lines. Perfect for colour-coding and decorating planners, journals and notebooks. Create fun doodling and lettering styles with a choice of 24 colours. Water-based ink doesn't bleed through most papers. Durable fiber point tips are long lasting and maintain shape after use.