Assorted 6-color Set Finecolour Sketch Marker Alcohol Based Ink, a Nice Alternatives to Cheap Art Markers, a Fine Point Tip and a Broad Chisel Tip Assorted 6-Color Set of Finecolour Sketch Marker double tips not replaceable alcohol based ink based on BCDS, not refillable a fine point tip and a broad chisel tip: 2mm and 6mm PP ellipse barrel and double caps