The Pentel Black MWL5M Maxiflo dry wipe white board marker has a medium bullet tip which provides long-lasting ink and vivid colours. It's suitable for classroom or meeting presentations on white or porcelain boards. Colour is especially important when making presentations or simply for general messages and the strength and depth of Maxiflo stands out from the crowd. It's a high quality, long lasting dry wipe marker. It has a unique pump action system to replenish ink supply if the tip has dried out. Its medium bullet tip provides an approx. line width of 3mm