This is remanufactured drum unit for Okidata OEM part #435019, #43501901. The page yield of this Okidata drum unit is 25,000 pages based on 5% page coverage. This drum unit is made of high quality standards and is guaranteed to meet or exceed OEM specifications. Toner Booth provides 100% guarantee all of its compatible cartridges and re-manufactured cartridges. You will also receive free shipping on all US order over $50.