Unlike their counterpart toner cartridges, the OKI 44844407 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 44844407 within your printer.This original OKI 44844407 drum unit takes cyan toner powder from the cartridge and places it with incredible accuracy onto the paper for fusing. This 44844407 drum unit is guaranteed to work with a handful of printers including the Oki C831.