HP 937 4-Pack CMYK(4) Original ink cartridge

Good to know  - The HP 6C400NE Cyan, Magenta, Yellow & Black Ink Cartridges produce consistent, high-quality prints you can count on - You'll get up to 1250 pages from the black cartridge and up to 800 from the colour ones - perfect for home or office  Compatible Printers: - HP Officejet Pro 9110 series - HP Officejet Pro 9120 series - HP Officejet Pro 9130 series - HP Officejet Pro 9720 series - HP Officejet Pro 9730 series Please note: Save up to 70% on ink with HP's Instant Ink service. When your printer is running low, it automatically orders more ink cartridges, so you don't have to order them yourself.The service works on how many pages you print, not how much ink you use. You can choose from a range of monthly page plans, and unused pages roll over to the next month. The price includes ink, shipping and cartridge recycling.