Can be writed in black cardboard or plastic or any place， than you will find it has powerful metal magic. If you want to highlight the importance in the book of file easily， You must have this pens.Features:- 11 colors make you easy to highlight- Writing is comfortable- Have metal light show in the paper Specifications:- Color/Style: This is a pack of 11 Colors at random (Description pictures only show parts of Colors/Patterns)ATTENTION: RANDOM 11 colors/styles only! We don¡¯t offer color choices. Color of the item will be sent at random. Please DO NOT bid if you can not accept random styles/colors- 100% brand new with high quality- Size: 13.3cmNote: Product may appear differently from itself due to different computer screen setting and lighting effect when the photo was taken. Please refer to product for true color.Package included:11x Liquid Fiber Marker Pens as the picture show