Original hp inkthe hp combo 303 tri colour black ink cartridges give you vibrant, top quality prints that will last for years.this combo pack contains both t6n01ae and t6n02ae cartridges, which are able to print up to 200 pages perfect for home, school or work.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 envy photo 6000 series hp envy photo 7000 series hp tango tango x