There are all more than ten color series to choose, so if you don't want to buy a whole set of markers and just want to use a series of them or expand your alternative colors, then this product is definitely the wonderful choice for you. DUAL TIPS: A 6mm broad tip for quick coverage and a 1mm pointed bullet tip for highlights, shadows, bullet points, sketching and general writing. Clean thick, thin or brushed lines can be achieved with ease. BLEND EASILY: It is easy to blend colors to create new colors. Dry quickly and no blooming. You dont have to worry about smudges and blotches. The only thing you need to worry about is how to enjoy your creative time. SAFE INK: Non-toxic and fast drying. Dual tips markers can provide you enough juice to use, no worrying about running out of ink mid-project. It can achieve great coloring effects and it is also friendly to beginners. UNIQUE DESIGN: Angular shape prevents markers from rolling off smooth table top. It's easy and comfortable to hold it. The color number features on the cap. You can intuitively see the color of each marker. And it's convenient to get the color you want when you're creating. WIDE APPLICATION: Suitable for illustrations, sketching, graffiti, hand lettering, coloring books, coloring diy crafts, fashion design, architectural renderings, and art classroom, etc.