This is a compatible Epson 33XL ink cartridge twin pack made up of 10 ink cartridges. Using the latest chips, each ink cartridge is guaranteed to work when replaced. The compatible 10 pack contains 4 x black, 2 x cyan, 2 x magenta and 2 x yellow. The black ink cartridges contain 22ml and each colour ink cartridges are filled to 12ml of ink, printing approx. 950 (black), 875 (cyan), 875 (magenta) and 875 (yellow) pages @ 5% average coverage. All 33XL inks are designed to work perfectly in your Epson XP printer, with premium printing results and a convenient money saving twin pack. XP-530,XP-540,XP-630,XP-635,XP-640,XP-645,XP-7100,XP-830,XP-900