HP C4821A No 80. Printhead and Printhead cleaner cyan for Designjet 1000 series. Page life - 2200. Ensuring that your printer is working at its very best, Hewlett Packard Printheads and Printhead Cleaners are essential for ensuring that your DesignJet printer gets the sharp and precise results that you deserve. Featuring an exceptional level of clarity, you never have to worry when printing even the most complex and tonally subtle images. This makes this printhead the perfect solution for printing high quality posters or other graphic items.