The HP 212A range are the standard capacity offerings for the Colour LaserJet Enterprise M555x and all of the other printers listed on this page. The yellow cartridges goes under the W2122A code and contains enough toner powder for an estimated 4,500 prints, despite its reduced price.When buying original Hewlett Packard toner cartridges, like the the 212A yellow , you get the very best results from your printer. HP are so confident in the W2122A, that a full warranty is offered with them directly, should you experience any issues.