The Famous Berol¨ Toughpointª Markers are back! Super tough acrylic tip won't mush down when writing on wood, concrete, stone or brick. Writes on any surface rough or smooth. New AUTOSEAL ink self seals if the cap is left off, won't dry out. It actually forms a thin skin around the nib, keeping it from drying out, but is easily broken when you continue writing again. The marker is 5 1/2" long, 3/4" in diameter, plasitc barrel, black only. 12 markers per box.