Brand New 12-piece Finecolour Sketch Twin Marker Set Alcohol Based Ink, Junior Marker Pens, Round Barrel, Double Tips, Assorted 12-color Pack Assorted 12-Color Set of Finecolour Sketch Twin 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 Round barrel and double caps with color numbers