whiteboard marker with exceptional ink darkness & 2.25mm line width making the text on whiteboard so visible & clear. Durable bullet nib that can last for multiple refills. Convenient refilling system. Easy to wipe even after a week. For better performance, place the marker tip down position for one hour before start writing. Product details\r\nUp to 48 hours cap off time Xylene free Low odour\r\n\r\n