Use VersaInk-nano 67 MS MICR Black Ink Cartridges in your inkjet printer to generate 100% bank compliant checks and VersaInk-nano 67 CS Tri-color ink cartridges contain cyan, yellow and magenta ink to produce bright, vibrant color. The bank code line on the bottom of every check is required to be printed with magnetic (MICR) ink to be readable by Magnetic Ink Character Recognition devises (MICR check readers) used at retail and financial outlets everywhere.