RIGHTINK 8Pack Black/Color Ink Cartridge of 44XL/43XL Suitable for Lexmark X9350,X9570, X9575, X9675 ,X7550, X7675, Z1520 Packing List: 4 Pack Black( 18Y0144 ) + 4 Pack Color ( 18Y0143 ) Page Yield : Black up to 550 / Color up to 500 pager per cartridge (at 5% coverage per paper) Type: Premium Remanufactured items, Not made by Lexmark but work as same as original one. Compatible Printer Models: Lexmark X4875, X4975, X6570, X6575, X9350,X9570, X9575, X9675 ,X7550, X7675, Z1520 All ink cartridges are manufactured in an ISO 9001 certified facility. All ink cartridges are engineered to produce superb results.