Itoya CL-100 Double Header Calligraphy Marker Set(6 colors) Itoya Doubleheader Calligraphy Marker Vibrant Set of 6. 3.0 mm point for wide lines, and a 1.5 mm point for narrow lines. Available in this package in six vibrant colors. Black, Blue, Green, Pink, Purple, and Red. Features archival safe, acid-free ink.