Okidata Genuine 5.5K Yield Toner Cartridge for Oki Printers: Oki MB260 MFP Oki MB280 MFP Oki MB290 MFP Oki MB260MFP Oki MB280MFP Oki MB290MFP PAGE YIELD: HIGH CAPACITY HIGH YIELD 5500 PAGE TONER CARTRIDGE OEM PART # 56123402 100% GENUINE AND ORIGINAL