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This HP 304XL Cartridges Black Duo Pack includes 2 black XL cartridges, so you¿ll always have a good supply of black ink at home. These cartridges let you print up to 300 pages in black. Check below to see which printers this ink cartridge is suitable for: Suitable printers HP DeskJet HP DeskJet 3720 HP DeskJet 3730 HP DeskJet 2620 HP DeskJet 2622 HP DeskJet 2630 HP DeskJet 2632 HP DeskJet 2633 HP DeskJet 2634 HP DeskJet 3732 HP DeskJet 3733 HP DeskJet 3735 HP DeskJet 3750 HP DeskJet 3760 HP DeskJet 3762 HP DeskJet 3764 HP ENVY HP ENVY 5030 HP ENVY 5020 HP ENVY 5032 HP ENVY 5050 HP ENVY 5010 Suitable for HP Instant Ink HP Instant Ink is a print plan that lets you print a fixed number of pages per month. You can cancel this plan every month, so you¿re not tied to anything. Your HP printer sends a notification to HP when the ink is almost empty. HP then automatically sends you a cartridge that¿s suitable for your HP printer.