ColorTonerExpert's HP C4906AN Black ink cartridge is a quality replacement to the expensive original inkjet cartridge of your HP ] printer. This cartridge was remanufactured with the highest quality standards possible to guarantee that it will work with your printer. It is made up of empty original cartridge that has been professionally recharged with specially engineered ink to match the print quality and page yield of original HP 940XL] ink cartridge. It has a new smart chip that lets it communicate with your printer and monitor ink levels. Colortonerexpert offers a 1 Year Money back guarantee and free shipping within the continental USA for all inkjets.