Features: 1.This is a professional print head that is compatible with a wide range of models 2.This print head is smooth and stable, and the color is natural. It is a worthy print replacement that you deserve 3.High quality ink with high degree of reduction and sufficient ink to save your cost 4.The nozzle is polished, no paper jam, and the printing process is smooth 5.All use Bayer raw materials from Germany, the quality is guaranteed specification: 1. This is a professional print head that is compatible with a wide range of models. 2. This print head is smooth and stable, and the color is natural. It is a worthy print replacement that you deserve. 3. High quality ink with high degree of reduction and sufficient ink to save your cost. 4. The nozzle is polished, no paper jam, and the printing process is smooth. 5. All use Bayer raw materials from Germany, the quality is guaranteed. : Color: Black or Yellow, Magenta or Cyan, CMYK (Optional) Applicable models: for HP Officejet Pro8000 or 8500 or 8500A Printhead Size: Approx. 94 x 57 x 20 mm or 3.7 x 2.2 x 0.8in Weight: approx. 80-160g Package List: 2 x Print Head Note: Please remove the polishing cardboard nozzle and remove the orange rubber plug before installation. Instructions: After receiving the product, remove the nozzle from the package. Before disassembling the protective device, shake the nozzle continuously to the left and right according to the figure to achieve the best use effect to achieve the best use effect. Then remove the protective device (orange with the outwardly turned handle). In order to avoid the internal inverted buckle of the protective device from damaging the circuit of the print head and causing the print head to fail to operate, pay attention to push the handle out as hard as possible. Then pull the reminder label together with the sealing blue tape to tear off. Finally, pull out the protective plug of the ink supply needle (the orange belt, please shake the nozzle arrow left and right before opening the protective clip). Installation steps: First take out the two old print heads, close the cover and turn on the printer power normally. After the print head indicator on the machine flashes, open the cover. At this time, the print head carriage (carriage) in the machine will move to the left of the machine. After it stops, install the two nozzles one by one and close the machine cover. The machine will perform calibration and print a test page. Some models will prompt