HP 70 Light Cyan and Light Magenta Printheads to fit Designjet Z2100 / Photosmart Pro B9180. OEM Ref - C9405A. Ensuring that your printing is working at the very highest level of clarity, HP Printheads are essential for printing photographic quality images as well as other graphic documents. HP is a giant in the printing industry and this is a position that they have attained through the constant production of high quality items. The No.70 Printhead is no exception, working in your machine perfectly to bring consistently fantastic results from the first print to the last.