... 1,Compatible Toner Cartridge for B411 / B431 / MB491 2,Page yield: 4000 and 10000 3,1 year warranty 4,ISO 9001 Model No.For ... /NN/COKI B411/B431/MB491BK4000NEWLOB431/NN/COKI B431/MB491BK10000NEWNew Compatible Toner Cartridge for OKI B411/B431/MB491 NOTE: Brand names and trade ... the property of their respective holders and are for descriptive purpose only. For more information, pls click the link: http ...