Pump Action Maxiflo Whiteboard Markers last up to 3 times longer than conventional whiteboard markers. They produce amazing bright and dense colours for better presentations and communication. If the cap is left off simply pump to rejuvenate ink supply. Will not dry out. Every last drop of ink can be used, thanks to the pump action. Xylene, toluene, acid and PVC-free. Made with 50% recycled materials.