... as white board led Fluorescent Marker Pen for LED Writing BoardIt's best choice for the LED writing board Specifications: 1 ... 15 times to make ink evenly 2. Open the pen cap, nib downward force in the on-board reduction, ... can't flow 4. Nib design for tow, one for the oblique head, another for the round, exchange the nib can ... used, place in dry place. led Fluorescent Marker Pen for LED Writing Board