Genuine Lexmark No. 42 Black X4850X6570/X7550/X9570 -Return Prg Per Unit Product Type: Ink Cartridge Compatibility: Lexmark Printers: P350 X9350 Z1520 X4850 X6570 X7550 Print Technology: Inkjet Typical Print Yield: 220 Page Packaged Quantity: 1, 1 Each