Whiteboard pens (multicolor) are made with: 1: Eco-friendly ink that meets international standards, bright colors, easy to erase, no residue, good writing durability, and no dust during use, smooth writing, bright colors, and clear writing. 2: The ink dries within 24 hours even if the cap is not closed, can be reused by adding ink, and comes with a quality guarantee. 3: Whiteboard pens are suitable for all primary and secondary schools, colleges and universities, various training institutions, essential teaching tools; they are also office tools in enterprises and government agencies, meeting rooms, and can be used to write on various whiteboards. 4: The main colors of the whiteboard pen are red, blue, black, and green.