Refillable HP #88 (No. 88) or No. 88 XL Compatible Ink Cartridge combo pack for Hewlett Packard Inkjet Printer This combo four pack (black, cyan, magenta, yellow) includes C9396AN high capacity black, C9391AN high capacity cyan, C9392AN high capacity magenta and C9393AN high capacity yellow refillable cartridges, all with Auto Reset Chips* installed They are compatible with normal capacity No. 88 cartridges C9385AN, C9386AN, C9387AN and C9388AN. Easy to refill! Never run out ink! Save Money! For use with HP Printers: Hewlett Packard OfficeJet Pro K550, K5400 Hewlett Packard OfficeJet Pro K550tn, K550twn Hewlett Packard OfficeJet Pro K550 tn, K550 twn Hewlett Packard OfficeJet Pro K550dtn, K550dtwn Hewlett Packard OfficeJet Pro K550 dtn, K550 dtwn Hewlett Packard OfficeJet Pro L7500, L7550, L7580, L7590 Hewlett Packard OfficeJet Pro L7600, L7650, L7680, L7700, L7750, L7780 HP No. 88 XL (#88-XL ) compatible ink cartridges (prefilled to full capacity with high quality American ink) combo package include: 1 x Refillable HP C9396AN (also known as HP #88XL, HP 88-XL, HP No. 88 XL) Compatible high yield black ink cartridge, page yield up to 2350, 59ml black ink. 1 x Refillable HP C9391AN (also known as HP #88XL, HP 88-XL, HP No. 88 XL) Compatible high yield cyan ink cartridge, page yield up to 1210, 17ml cyan ink. 1 x Refillable HP C9392AN (also known as HP #88XL, HP 88-XL, HP No. 88 XL) Compatible high yield magenta ink cartridge, page yield up to 1210, 17ml magenta ink. 1 x Refillable HP C9393AN (also known as HP #88XL, HP 88-XL, HP No. 88 XL) Compatible high yield yellow ink cartridge, page yield up to 1210, 17ml yellow ink. 1 x syringe Detailed instructions (in English) * ISO9001 certified *Auto Reset Chip (ARC) is a smart chip that reset the ink level to full automatically when the ink is about to run out. You just refill the ink when there's a "ink low" warning, turn the printer off, wait a few seconds then turn it back on. The ink level will appear full again. This enables you to refill and reuse the cartridge again and again. The Advantages of Refillable Ink Cartridge over One time use Ink Cartridges High Quality of Refillable Cartridge easy refill directly from the refill hole. No Drill! No leak! No Mess! Great for all residential and business customers. Refill within 60 seconds! Anybody can do it! If you know how to use syringe to inject liquid into a small hole, you will be able to refill this cartridge with ease. Incredible savings compared to the cost of cartridges. Each refill cost less than 5 cents! Save 99% off your printing cost! Easy Installation. True system ready for "Plug & Play". Never run out of ink at that inconvenient moment! No need to go out in bad weather to get that tiny ink cartridge which is not only expensive but runs out quickly. No more Cartridges waste! Save the environment! No more un-use Ink waste! When one color runs out in a multicolor ink cartridge, usually you have to get a new cartridge and throw the whole cartridge away. Not any more! With our refillable cartridge, you just refill that color and drop the cartridge back into the printer. No more messy refills! Well, if you'd ever tried to refill an ink cartridge, you know how messy it can get. Not any more! With our cartridge, you don't need any tools besides the included syringes. Just unplug the empty ink chamber, use the syringe to draw the correct amount of ink of corresponding color, inject the ink into the chamber and monitor the ink level through the clear plastic window at the side of the cartridge, plug the refill hole and that's it.