YMCKO ribbons consist of yellow (Y), magenta (M) and cyan (C) panels for printing a full spectrum of colors. The K panel is a black and is used for printing text. The O panel is a thin, clear protective overlay that seals over the top for enhanced durability. This ribbon is designed to specifically for the ID Maker Apex card printer and provides 300 single-sided prints or 150 dual-sided full color prints. Plus, with our 30-day money-back guarantee, you can be sure you’re getting the best product for your money. Also included is a cleaning roller.