Features: 1.This is a professional print head that is compatible with a wide range of models 2.This print head is smooth stable, the color is natural. It is a worthy print replacement that you deserve 3.High quality ink with high degree of reduction sufficient ink to save your cost 4.The nozzle is polished, no paper jam, 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 stable, the color is natural. It is a worthy print replacement that you deserve. 3. High quality ink with high degree of reduction sufficient ink to save your cost. 4. The nozzle is polished, no paper jam, the printing process is smooth. 5. All use Bayer raw materials from Germany, the quality is guaranteed. : Color: Black \/ Yellow, Magenta \/ Cyan, CMYK (Optional) Applicable models: for HP Officejet Pro8000\/8500\/8500A Printhead Size: Approx. 94 x 57 x 20 mm \/ 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 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 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 hle). In order to avoid the internal inverted buckle of the protective device from damaging the circuit of the print head causing the print head to fail to operate, pay attention to push the hle 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 right before opening the protective clip). Installation steps: First take out the two old print heads, close the cover 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 close the machine cover. The machine will perform calibration print a test page. Some models will prompt \