OKI B4550 Toner Cartridges

The OKI B4550 uses compatible black toner in two sizes: the standard 43502301, rated at about 3,000 pages, and the high yield 43502001, rated at about 7,000 pages. A compatible drum, 43501901, is rated at about 25,000 pages. The same supplies also fit the B4550n, B4600 and B4600n. Same-day shipping on most orders.