Details: • Dual Brush & Fineliner Tips for Versatile Creativity: Ohuhu coloring markers for adults feature robust dual tips with a smooth ink flow. The 0.4mm extra fine tip is perfect for intricate detailing, writing, drawing, and doodling with precision, ideal for bullet journaling. The 1-5mm flexible brush tip is excellent for larger art projects, such as shading, coloring, and blending, enabling you to create unique patterns in your journal. • Water-Based, Non-Bleeding Ink: Ohuhu colored markers boast a 2.4g ink capacity, which is quick-drying, non-toxic, odor-free, and acid-free. Certified by ASTM D-4236 for safety, Ohuhu markers for coloring books prevent bleeding and smudging, even with multiple layers. • 80 Highly Pigmented Colors for Bullet Journal: Featuring a wide range of shades, including pastels and neons, Ohuhu marker set are perfect for bullet journaling, coloring, drawing, calligraphy, and sketching. With ink colors matching the cap colors and each pen numbered, finding your desired shades is quick and easy. • Portable Case Package: Included is a blank DIY color swatch card to organize your colors to your liking. The markers bulk comes in an environmentally friendly carrying case with a handle for easy storage and portability. • Tips for Color Mixing and Paper Selection: Combine similar hues with subtle differences for seamless mixes or start by coloring on heavyweight watercolor paper with the brush tip, then gently blend with an Ohuhu watercolor brush pen (not included) or a wet brush to achieve a stunning watercolor effect. For the best results, always use heavyweight watercolor paper to avoid scratching or peeling.