MULTIPLE COLORS: Shuttle Art 30 colors Art Markers set provides 30 unique eye-catching and vibrant colors including all the primary colors you might need for your art creation, and it can be blended nicely for added dimension to your artwork. UNLIMITED USES: Our markers feature a 4mm broad chisel tip for quick coverage and a 1mm fine bullet tip for detailed lines highlight. It's ideal for coloring, drawing, sketching, illustrating, shading, designing, rendering, comics, adult coloring books and more. EASY TO USE: Each Marker Cap is marked with color code at both ends makes it easier to choose right color. Small Round barrel design makes it comfortable to hold by kids as well as adults. And there also have ridges on the cap to prevent the markers from rolling off on smooth surfaces. In order to prevent the ink from bleeding in use, the tip should not stay on the paper for a long time . CAUTIONS: The marker set is non-toxic and acid-free, safe for kids and students, conforming to ASTM-D4236. In order to prevent the ink bleeding in use, the tip should not stay on the paper for a long time. Markers need to write on a specific mark paper so that it doesn't bleed to the next layer. To prevent the marker from drying and ink leaking, please recap and keep the marker laid flat after use. SAFETY GUARANTEE SERVICE GUARANTEE: The marker set is non-toxic and acid-free, safe for kids and students. Your satisfaction is our top priority, please rest assured to purchase our products. If you are not satisfied with our products or have any questions, please feel free to contact us at any time.