Our Toner Cartridge replacements for the Okidata B4500 cartridges are designed and manufactured by an ISO-9001 facility and match Genuine name-brand cartridges at a fraction of the cost. These Okidata B4500 Toner Cartridges will provide optimal print quality and page yields. We've been selling products like compatible B4500 Toner Cartridges for over 13 years and think you'll find great value in comparison to the OEM Okidata B4500 supplies.