Features: 1. VIBRANT & NICE COLORS: 1 set of 21 colors, this outline pens enable you to automatically outlines, allowing you to create a dual-color effect. 2. PREMIUM INK: Super squiggles outline markers are made of high standard ink that is odorless, non-toxic, acid-free, and environmental, giving you peace of mind. Be assured to use them for different craft projects. Plus, these doodle dazzles shimmer markers are well pigmented, very fluid, writes smoothly and appear like magic, making your artwork looks gorgeous and sparkle. 3. EASY TO USE: Just shake, push the tip down until the ink goes down to the tip then write. They outline a thin, saturated outline of the color of the marker cap, leaves a solid color on the other side. For best performance, Re-Cap the marker pens Immediately After Use and Store Horizontally. Make sure you write on a hard paper (2.82 oz/m and above). 4. MULTIPLE USAGES: The double line pens are good for lettering, card making, adult coloring books, gift tap, ornaments, doodle, arts and crafts. Premium color quality will make your art work looks impressive, added more fun for writing and drawing. 5. IDEAL GIFT GIVING & GUARANTEE: If your kids and friends are into crafts and arts, It's an ideal gift for Birthday, Christmas, Holiday or any given occasion. These markers are comfortable to hold. Specification: Material: Fiber, ABS Product Color: Multicolor Product Size: Length: 13.5cm Product Weight: 395g Package Included: 1 Set x Outline Markers