This genuine Hewlett Packard 51604A cartridge is filled with enough black ink to offer users and estimated 750,000 printed characters.As an original HP product you can expect unrivaled print quality and unbeatable compatibility for the life of the cartridge. This HP 51604A cartridge is compatible with the HP QuietJet Plus and all other printers listed above.All of our brand new Hewlett Packard toner cartridges carry a 100% satisfaction guarantee. Included in this fantastic price is VAT and delivery, so what you see is what you pay!