24 Colors Glitter Pens: The double-row pens contain 24 bright and shimmering metallic colors. The 2mm medium contour markers write in a silver metallic texture surrounded by a colored border. The ink has good adhesion, bright and vibrant colors, beautiful lines, and is easy to write with. Use paper with a thickness of 80g or more to prevent the ink from bleeding through to the other side of the paper. Unique Metallic Contour Pens: 24 bright colors with a double line and glitter effect. All colors glide smoothly on the double-lined pens with fiber tips. You'll see the vibrant metallic silver color surrounded by colorful borders for a beautiful two-tone effect. Use paper with a thickness of 80g or more to prevent the ink from bleeding through to the other side of the paper. Three Writing Effects: Our magic pens have a unique automatic double line function. When writing on light or white paper, you can draw two lines simultaneously: one in metallic silver and one in color. On dark or black paper, only the silver line is visible. When painting on glossy surfaces, only the colorful paint will be visible. Easy to use: Shake the glitter marker enough to mix the ink with the tip before opening the cap. Then remove the cap and gently press the tip against the paper for a few seconds until the ink flows to the tip and start creating. It is recommended to close the pen immediately after use and store it horizontally. Works on multiple surfaces: Available in 24 bright colors with glossy ink that provide vibrant color and a sparkling shine. Also suitable for almost all surfaces, including metal, ceramic, wood, rubber, glass, plastic, stone, and more. (They cannot make double lines on some objects, but they do give metallic colors.)Wide Range of Applications: Felt-tip pen set for painting, handwriting or drawing, perfect set for Advent calendar, personalized photo album design, guest book, wedding, scrapbooking, writing gift certificates, Christmas cards and stickers, Easter crafts, gift tags, crafts, coloring books, kraft paper, calendar family planners, wood, glass, whiteboards, flipcharts and plastic, for children and adults. Note: Use these glossy pens on cardboard and not on regular drawing paper to avoid bleeding.