Lexmark International Products – Ink Cartridges Combo Pack, 220 Page Yield, Black/Color – Sold as 1 PK – Ink cartridges are designed for use with Lexmark X4850, X4875, X4950, X4975, X6570, X6575 X7550, X7675, X9575 and Z1520. Combo pack includes a No. 41 color ink cartridge and a No. 42 black ink cartridge. 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