The HP 212X is the high capacity range of toner cartridges, compatible with the Colour LaserJet Enterprise MFP M578dn and ever other printer we list on this page. The full product code of the cyan  is W2121X and has an enhanced estimated page yield of 10,000 prints, more than twice that of the standard capacity.Purchasing genuine high capacity Hewlett Packard toner cartridges, like the W2121X, gives you the lowest price per page and doesn�t compromise print quality. Hewlett Packard guarantee the cyan 212X directly, so in the incredibly rare instance that there is a problem, you have the most knowledgeable support at your disposal.