The Compatible Hewlett Packard 903XLBK Black Inkjet Cartridge is a replacement Ink Cartridges that are manufactured not by the OEM (Original Equipment Manufacturer) HP, but by a third party. This product is similar to the original in terms of quality and performance and meets our stringent quality standards. The Compatible Hewlett Packard 903XLBK Black Inkjet Cartridge carries a 1 year Money Back Guarantee. So, in addition to getting all the benefits of a genuine Compatible Hewlett Packard 903XLBK Black Inkjet Cartridge product, you also get a significant price benefit and a higher capacity when you buy the Compatible Hewlett Packard 903XLBK Black Inkjet Cartridge from Dublin Cartridge.