For the artist who has to have everything, this pen set is perfect. It features eight different pens with different nibs for fit any ink project. It's ideal for mixed media, illustrations, urban sketching and hand lettering. Details:BlackIncludes multiple sizes6 sets (8 pens per set)Permanent and waterproofArchival Lightfast and odorlessIndia inkSet Contents: XS - extra superfine tip (0.1 mm)S - superfine tip (0.3 mm)F - fine tip (0.5 mm)M - medium tip (0.7 mm)B - brush tip1.5 - bullet nib (1.5 mm)SB - soft brush tipSC - soft chisel tip