Whiteboard pens (multicolor) are made with: 1: Eco-friendly and non-toxic ink that meets international standards, bright colors, easy to erase, no residue, good writing durability, and safe use with no dust or pollution, smooth writing, bright colors, and clear writing. 2: The pen can be used for up to 24 hours without drying out, can be refilled and reused, 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.