Unlike their counterpart toner cartridges, the OKI 44844408 imaging drum unit is filled with some fairly complex inner workings. This means that to get the very best from your printer and ensure that it works flawlessly, you need a genuine OKI 44844408 within your printer. This original OKI 44844408 drum unit takes black toner powder from the cartridge and places it with incredible accuracy onto the paper for fusing. This 44844408 drum unit is guaranteed to work with a handful of printers including the Oki C841.