High yield black toner cartridge for use with okidata b4550, b4550n, b4600, b4600n, b4600nps. This is a OEM MONOCHROMATIC TONER OKIDATA brand Toner Cartridge (HI BLACK TONER) that works with the following printers / machines (B4550, B4550N, B4600, B4600N, B4600NPS). Product Features: Cartridge Yield: High Capacity Compatible with: B4550, 4550n, 4600, 4600n, 4600nPS, 4600PS Duty Cycle: Up to 7000 pages ISO/IEC 19752 Printing Color: Black Printing Technology: LED Product Description: OKI - High Capacity - black - original - toner cartridge Product Type: Toner cartridge Benefits of this product: Designed for exact compatibility with OKI products, only OKI consumables ensure maximum performance, longevity and ultimate cost-effectiveness. OKI's ribbon cassettes, heads, toner and EP cartridges and other consumables are an integral part of the fundamental design of its printer and fax products, combining with other key elements of their design to deliver optimum durability, reliability and print quality. HIGH YIELD BLACK TONER. B4550, B4550N, B4600, B4600N, B4600NPS. OEM OKIDATA Brand.