DUAL BRUSH COLORING MARKERS: Piochoo dual tip markers feature both a fine tip and flexible brush tip which will bring much more fun to your art projects.You can create ultra fine line by 0.4mm hard tip,and fine ,medium or bold strokes by a change in brush pressure. BRIGHT COLORS:24 classic and vivid colors that perfect meet all you need for adult coloring books,bullet journals,scrapbooks,planner,manga,calligraphy,coloring,writing,note-taking,sketching,drawing,etc. SMOOTH WRITING:Every pen will give you a smooth writing experience with no smear.Water-based ink,easy to flow,odorless,acid-free,non-toxic,dry fast.Its safe for kids. HIGH QUALITY:0.4mm fine tip for detailed outlining and fine lines,resilient flexible 1-4mm nylon tips for coloring and shading .These dual tip brush pens have plenty ink that you don't have to worry about running out quickly. GREAT GIFT:These dual tip markers are the perfect festival gifts that suitable for adults, kids, teachers, students,or artists.Its quipped with a transparent case for ease in carrying and storing.Please feel free to contact us for any defective or damaged orders,we will offer best solution to you.