These are not a refilled Hewlett Packard CF330X, CF331A, CF332A and CF333A toner cartridges, these are remanufactured toner cartridge that contains both cleaned reusable components from a HP original cartridge and brand new compatible components where necessary. The result is eco-friendly toners that are also gentler on your pocket. Our remanufactured HP 654X/HP 654A laser toner cartridges have enough high quality compatible black, cyan, magenta and yellow toner powder in them to produce the same quantity of prints as a HP original. Recycled by one of the select remanufacturers we have chosen to work with, this Hewlett Packard CF330X, CF331A, CF332A and CF333A multi-pack contains one of each colour cartridge for your printer. These remanufactured HP 654X/HP 654A toner cartridges are fully compatible with a select few printers including the HP Colour LaserJet Enterprise M651n. A full list can be found in the compatibility section of this listing.