The Kores Whiteboard Marker M20843 'XW1' is a versatile writing tool that is ideal for presentations, meetings, and teaching. With a 3 mm round tip, it allows for precise and clear lines, suitable for both whiteboards and flipchart pads. The set of four includes the colors black, blue, red, and green, covering a wide range of applications. The quick-drying ink ensures that your notes and drawings are immediately visible without smudging. Additionally, the ink can be removed without leaving any residue or shadows, ensuring a clean and tidy use. With a 48-hour cap-off time, you can be confident that the markers won't dry out even with occasional non-use. Furthermore, the markers are free from harmful chemicals such as xylene, benzene, and toluene, making them a safe choice for all users.