Features: If your printhead is 11 or C4810A, C4811A, C4812A, C4813A, you can buy this for your printer.If not, Do not buy it.Any questions, please contact us for advice, thank you!Compatible printer:For 11 1000 1100 1200 2200 2280 2600 2800 CP1700 100 500 9100 9120 K850.If your printhead is 11,our cartridge will suitable with your printer.Note:Open the lid and remove the film before use.Specifications: Product model:Printhead For HP 11(C4810A C4811A C4812A C4813A)Cartridge Color : Black, Cyan, Red, Yellow (optional)With Chip: YesWith Ink: YesCompatible printer:For HP 11 1000 1100 1200 2200 2280 2600 2800 CP1700 100 500 9100 9120 K850Package Includes: 1Set x Printer Head with Inknote: 1. When installing the nozzle, you must remove the air hole seal according to the instructions, but do not remove other seals at will, otherwise the ink will leak;2. Each for time a new nozzle is installed, the print for head should generally be cleaned 3-5 times (please wash the print for head at least once);3. When any print for head has no ink or is not installed, even if there is ink in the other print heads, the photo machine will not work;4. Once the new nozzle is off, it is best not to remove it before replacing the nozzle;5. Unless you want to replace the nozzle, do not open the nozzle protective clip, otherwise the nozzle may no longer be used;6. Do not reach into the printer or for touch the nozzle when the printer is working; first check whether the ink of a certain color in the ink cartridge has been used up.