Replacement cartridges have been produced to the most exacting standards using the most modern and technically proficient techniques. Please ensure that you have the correct cartridge before installation. Be sure to remove the cellophane strip, and / or protective plastic clip before attempting to use the cartridge. For optimum print quality it is recommended that you run a full cartridge cleaning cycle on your printer after installing your new cartridge(s). This procedure may vary depending on the make and model of your printer. Please consult your user manual for instructions. In the unlikely event that you require assistance when installing your cartridge or it is not printing to your satisfaction, click link above