The OKI 44574307 image drum is an essential component for the B401, and every other laser printer listed on this page. By purchasing a genuine OKI 44574307 you can guarantee the finest print quality and unmatched reliability for the extensive life of the imaging drum unit.The 44574307 has an official estimate page yield of 25,000, calculated by OKI themselves, meaning the cost per page of this item is mercifully low. There is no better way of processing the toner powder within your OKI laser printer than this original 44574307 black drum unit.