The Artline 550A, 509A, and 550A Alcohol-Based Ink (Xylene-Free) for whiteboard markers is a refill ink designed to restore the ink in your dry-erase markers. With a 20ml bottle, this alcohol-based ink provides vibrant colors and smooth writing without the harsh smell of xylene, making it a safer, more eco-friendly option. It is ideal for use with Artline whiteboard markers and helps maintain their effectiveness for extended periods, reducing waste by allowing the reuse of markers. This ink is perfect for schools, offices, and other environments that use whiteboards regularly.