Fargo 45010 YMCKOK ribbon consists of yellow (Y), magenta (M) and cyan (C) panels for printing a full spectrum of colors by combining the colors using varying degrees of heat and the O panel is a thin, clear protective layer. The two K panels are black resin panels, typically used for printing text and barcodes.  The Fargo 45010 YMCKOK ribbons are for dual-sided printing, with YMC, the first K and O panel printing on the front side; the second K panel prints on the back side of the card.  The Fargo 45010 color ribbon includes a cleaning roller and can be used with Fargo DTC1000 card printers.