They are always the best choice whether you are sketching, doodling, coloring, scrapbooking, drawing, writing diaries, calligraphy or making decoration in all kinds of activities. With these amazing pens, your life will be full of creativity and happiness. - Dual tip marker features both a flexible brush tip and firm fine tip, Blendable, water-based ink - Brush pressure can be used to create medium or bold strokes - Ink is water-based blendable, odorless and non-bleeding - Acid free and non-toxic DUAL TIP DESIGN We offer a flexible brush tip and fine tip in one marker ,Fine tip is 0.4mm ,brush tip is 1-2mm.the fine tips and brush tips let you color any size designs,which is a great feature.So you get both colored brush markers and colorful fine liners pen. FINE TIP Fine liner tip great for provides precise control when drawing, detailing, outlining, doodling, journaling, or taking notes. BRUSH TIP Brush marker tip great for broad writing, shading, filling in and blending. Flexible brush tip great for illustrations, shading, coloring, or highlighting, scrap booking. Made of smooth and resilient nylon fibers, the bold tip works for wider area coverage.