Vibrant Glittery Colors? These self-outline pens write in vivid metallic silver surrounded by colored borders, even on dark and colored paper. Each color is attractive and adds a splash of creativity and fun to objects. Perfect for making cards, bullet journaling, writing, drawing, school projects and innovative gift for kids. ?Upgraded Double-line Effect? We hear your feedback! After long-term data and research, we update every detail. Our double-line could be more pronounced, the writing will be eye-catching to create a beautiful dual-color effect. And it provides rich, consistent color. Smooth and shimmery! Adds sparkle embellishment to various craft work. ?Premium Quality & Non-Toxic? Double line Metallic pens are made with water-based, opaque metallic ink. The ink is acid-free, environmentally friendly, and non-toxic. Ergonomically designed, ensuring comfort even when you work with them for a long time. Safe metallic markers for kids and adults. Gift for family, Best gift for Children. ?Easy to Use? With the cap on, shake the marker well to mix the ink. Take off the cap and gently press down the tip on the surface a few times to pump the ink until it starts to flow. For best results, re-cap the markers immediately after use and store horizontally.