Product name: GREENBOX Remanfactured toner cartridge with upgraded chip replacement for Canon CRG-034 CRG034 ( 1 Black 1 Cyan 1 Magenta 1 Yellow, Total 4 Pack); Compatible With: Canon imageCLASS MF810Cdn imageCLASS MF820Cdn Printers;Original Part No.: 9454B001 9453B001 9452B001 9451B001; High Yield: Up to 12,000 pages for mf810cdn black toner & 7,300 pages for mf820cdn color toner at 5% coverage (A4 paper size); Nice Print Quality: GREENBOX CRG034 toner cartridge can provide clear text and graphics, print the color effect you want on the paper without smear