Ink cartridge is designed for use with the Lexmark X4850, X4875, X4950, X4975/VE, X6570, X6575, X7550, X7675, X9350, X9575 and Z1520. Evercolor2 ink, a unique formulation of pigment-based color ink, combines exceptional resilience with improved archivability. Evercolor2 ink is water-resistant, fade-resistant, humidity-resistant and highlighting-resistant. Lexmark Return Program 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. Cartridge yields approximately 485 pages.