123inkjets offers you an alternative to replacing your entire Hewlett Packard C8728AN (HP 28 Tri-Color) ink cartridge, replace the ink! Save money and refill your cartridge yourself for significantly less than the cost of replacing the cartridge. We suggest refilling your ink cartridge as soon as it runs out of ink. Trying to print on an empty Hewlett Packard ink cartridge can cause the printheads on your cartridge to burn out. Our InkTec inkjet refill kits provide all the tools necessary for refilling your ink cartridge several times. Spend less and print more with our inkjet refill kits!