Lexmark E321, E323 print cartridges are designed for easy customer installation and quality performance. The Lexmark E321, E323 supplies are not compatible with other Lexmark Printers including the E320/E322. To help customers quickly identify the difference, the Lexmark E321, E323 supplies have a two-tone design. Average Cartridge Yield 3,000 standard pages. Declared yield value in accordance with ISO/IEC 19752.