- Flexible brush (1.0 mm) and fine tip (0.5 mm) in one pen - Blendable, dye-based ink for painterly effects - Great for lettering, illustration, and watercolor work - Available in multiple curated color sets Add in vibrant watercolor effects with Staedtler Double-Ended Watercolor Brush Pens, designed for both precision and bold marks. Each pen features a flexible brush tip on one end and a fine bullet tip on the other, giving you the freedom to switch from sweeping strokes to delicate details with ease. Create realistic brushstroke-like effects with the flexible brush tip, which lays down line widths of 1.0 – 6.0 mm. Use the fine tip for fine line work with line widths from 0.5 – 0.8 mm. The smooth, dye-based ink blends beautifully with water and reacts well on watercolor paper to create stunning gradients and layered effects.