Other than the commonly used Hewlett Packard toner cartridges, imaging drum units (like the CF232A) are the most well-known consumables in laser printers. Designed to handle the black powder that comes from the Hewlett Packard toner cartridge, this genuine HP 32A image drum plays an incredibly important part in the printing process.Drum units play such an important role, that original Hewlett Packard components are always preferable if you can justify one. This genuine HP 32A imaging drum unit is guaranteed to be compatible with the HP LaserJet Pro MFP M227fdn and all other printers found listed on this page.