. The 304 Black ink cartridge has been precisely formulated by HP to deliver reliable and quality printing results. This is done by working harmoniously with HP paper and your HP printer. Over 50 Percent of the printing technology of your HP printer is contained within the cartridge itself meaning every time you replace your ink cartridge you are installing a brand new print engine.Unlike non-HP cartridges which can sometimes have hidden costs Original HP ink cartridges offer total value for money in the form of flawless hassle-free printing and are carefully crafted to match your printer’s size speed fusing temperature and paper type.Once finished HP products can be recycled with HP (see pack for instructions). Download the pre-paid postage labels from the HP website to return used products for recycling.This cartridge is compatible for use with the following HP Printer models only. Using your HP cartridge alongside an HP printer results in the perfect balance of colour permanence and reliability. HP AMP 130 Printer (T8X39B)HP DeskJet 2622 All-in-One Printer (4UJ28B#BEV)HP DeskJet 2630 All-in-One Printer (V1N03B#BEV)HP DeskJet 2632 All-in-One Printer (V1N05B#BEV)HP DeskJet 2633 All-in-One Printer (V1N06B#BEV)HP DeskJet 2634 All-in-One Printer (V1N07B)HP DeskJet 3720 All-in-One Printer (J9V93B)HP DeskJet 3720 All-in-One Printer (J9V95B)HP DeskJet 3730 All-in-One Printer (T8X01B)HP DeskJet 3733 All-in-One Printer (T8X07B)HP DeskJet 3735 All-in-One Printer (T8X10B)HP DeskJet 3750 All-in-One Printer (T8X12B)HP DeskJet 3760 All-in-One Printer (T8X19B#BEV)HP DeskJet 3762 All-in-One Printer (T8X23B)HP DeskJet 3764 All-in-One Printer (T8X27B)HP ENVY 5010 All-in-One Printer (M2U85B#BHC)HP ENVY 5020 All-in-One Printer (M2U91B)HP ENVY 5030 All-in-One Printer (M2U92B#BHC)HP ENVY 5032 All-in-One Printer (M2U94B)HP ENVY 5050 All-in-One Printer (Z4A61B#BHC). .