Permanent Marker - Size: 2.0-5.0mm Chisel Tip Artline EK-90 High Performance permanent markers are our best selling sized permanent marker with a chisel nib. Long lasting clear drawing is assured with the fast drying and water resistant ink that is perfect for marking on most surfaces including paper, plastic and metal. Artline Permanent Markers come in a variety of colors. Sold by the dozen (12 markers).