Oki Black Toner Cartridge for B710/720/730 Series, 52123601, 18,000 Pages, N/DN Series Brand New 18K Yield Toner for Okidata B710/720/730 N/DN Series Installation in 2 minutes. About 7 lb. Sealed and ready to use, no messing with toner powder or computer chip NEW Cartridge includes new computer chip Introductory Price, Won't Last! Stock up 2 or more