Original hp inkdesigned to deliver consistent, reliable results for your hp printer, the combo 304 tri colour and black ink cartridges are perfect for printing vivid colour photos and everyday documents.the hp 304 cartridge is able to print 100 pages using the coloured inks and 120 using the black ink'. '.strtoupper('h')elping you save money, the combo pack is perfect for replenishing all your ink without having to purchase the ink individually'. '.strtoupper('a')nd when the cartridge is finished, you can recycle it for free with hp planet partners.hp instant inksave up to 70% on ink with hp's instant ink service'. '.strtoupper('w')hen 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'. '.strtoupper('y')ou can choose from a range of monthly page plans, and unused pages roll over to the next month'. '.strtoupper('t')he price includes ink, shipping and cartridge recycling.compatible printers hp amp 130 hp deskjet 2000 series hp deskjet 3000 series hp envy 5000 series