This is a genuine SATO replacement print head, part number R37901900. It is compatible with SATO CL4NX Plus model printers. The print head offers a resolution of 305 dots per inch (DPI) and 12 dots per millimeter (DPMM). It produces the heat required for printing and includes mounting hardware. This print head is a compatible replacement for the discontinued CL4NX print head, part number R29798000.