This is a compatible Epson 33XL ink cartridge twin pack made up of 12 ink cartridges. Using the latest chips, each ink cartridge is guaranteed to work when replaced. The compatible 12 pack contains 4 x black, 2 x photo 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), 590 (photo 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 multipack. XP-530,XP-540,XP-630,XP-635,XP-640,XP-645,XP-7100,XP-830,XP-900