Ink cartridge is designed for use with Lexmark X3650, X4630, X4650, X5650, X6650, X6675 and Z2420. Variable size ink droplet technology allows for more vivid and precise image quality. Nonrefillable cartridge is licensed for single use only. Lexmark Return Programme Cartridges are sold at a discount, versus the prices of regular cartridges, in exchange for the customer's agreement to use the cartridge only once and return it only to Lexmark for remanufacturing or recycling. Yields 500 pages.