FeaturesWhiteboard marker with unique pump action system to replenish ink supplyPress end button to rejuvenate ink flowFor use on white or porcelain boards6.0mm medium bullet tip gives a line width of approx. 3.0mmWallet of 4 contains 1 each black, red, blue & green inkAn assorted colour Pentel Maxiflo Bullet Tip Whiteboard Marker (4pc Set) with a unique push-button pump that allows the ink supply to be refreshed as required even when the cap has been temporarily left off.  Use Pentel\'s Maxiflo liquid ink system to provide a fresh supply of liquid ink, right to the last drop, giving long-lasting value, outperforming standard types.  Unique push-button pump operation allows the ink supply to be refreshed as required and restores the tip even when the cap has been temporarily left off.  Ink simply wipes off whiteboards with a dry cloth.