Buy your Compatible Oki 43381721 Yellow Drum Unit (43381721 Laser Printer Imaging Drum) for far less than the original drum price of £54 . The Compatible Oki 43381721 Yellow Drum Unit will work in the following printers OKI C5550 MFP , OKI C5800 , OKI C5900 it will give you a page yield of approx 20,000 pages @ 5% average page coverage. The Compatible Oki 43381721 Yellow Drum Unit offers you a low cost alternative compared with original drumsCompatible Oki 43381721 Yellow Drum Unit (43381721 Laser Printer Imaging Drum)