Genuine Lexmark 18C0034E (No34) 'high yield' black ink cartridge. For use with Lexmark P4300 series, P6200 series, P6300 series, X3300 series, X5200 series, X7100 series, X7300 series, X8300 series & Z810 series machines, including the P900, X2500, X2510, X2530, X2550, X3530, X4530, X4550, X5070, X5075, X5320, Z810, Z812, Z815, Z816, Z818, Z845, X5250, X5260, X5270, X5210, X7170, X8350, Z1300, Z1310, Z1320, Z1400, Z1410, Z1420 and many others. Up to 475 prints @ 5%