A genuine OKI 44992401 toner cartridge like the one you see here offers an unbeatable quality of print and is quite simply the best option for your monochromatic laser printer. You will find the genuine OKI 44992401 to be compatible with the Oki MB451w and any other printers listed on this page.OKI are known for creating some of the very best consumable toner cartridges on the market and this black 44992401 is another fine addition to their existing range. However, OKI still fully guarantee this 44992401 and estimate that it will give you around 1,500 prints (@5% average page coverage).