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This is a professional print head compatible with a wide range of printer models. The print head is smooth and stable, providing natural colors. It is a high-quality replacement you deserve. The ink used is of high quality, ensuring a high degree of color accuracy and saving costs by providing sufficient ink. The nozzle is polished to prevent paper jams and ensure a smooth printing process. All materials used are from Bayer in Germany, guaranteeing excellent quality.

Specifications:

- Color: Black / Yellow, Magenta / Cyan, CMYK (optional) - Applicable models: for HP Officejet Pro8000/8500/8500A print head - Size: Approx. 94 x 57 x 20 mm / 3.7 x 2.2 x 0.8 inches - Weight: approx. 80-160g Package list:

- 2 x print head Note:

- Please remove the nozzle for polishing cardboard and the orange rubber plug before installation.

Instructions:

After receiving the product, remove the nozzle from the packaging. Before disassembling the protective device, shake the nozzle continuously left and right to achieve the best use effect. Then remove the protective device (orange with the outward-facing handle). Push out the handle as hard as possible to avoid damaging the circuit of the print head. Remove the reminder label and sealing blue tape. Finally, pull out the protective plug on the ink supply needle.

Installation steps:

- First, remove the two old print heads and close the printer cover. Turn on the printer normally. Open the cover after the print head indicator flashes. The print head carriage moves to the left. Install the two nozzles one by one and close the cover. The printer will perform calibration and print a test page. Some models may receive the message \"calibration failed\", but this does not affect the quality of the print head. Just click \"OK\" or \"Confirm\" to continue printing.

Reminder:

- Some models may calibrate and print a test page every time they are turned on. Click \"OK\" or \"Confirm\" to continue.

- Some models may perform a longer calibration before and after the first print, lasting about 20 minutes. Do not turn off the machine or press any control button during this time to avoid affecting the calibration.

Precautions:

1. Avoid physical contact with the nozzle holes and circuits to prevent damage.

2. Check the ink cartridge regularly to ensure there is enough ink. Add ink in time to avoid damaging the nozzle due to lack of ink.

3. Do not leave the printer unused for too long to avoid clogging the nozzles.

4. Avoid frequently removing or not installing the nozzles for a long time, as this can cause problems with ink supply and affect the printing effect.

5. If the printer prompts \"KY print head failure\" or \"C business head failure\", gently wipe the circuit contacts of the broken print head with an eraser before reinstalling and using it.

6. If the printing effect is not satisfactory, you can perform the \"cleaning nozzle\" function in the printer settings, or soak the nozzle hole with clean 50-60 degree drinking water for 3-5 minutes. Remember to clean the water stains before installing the nozzle.

100% satisfied: Our customers are our top priority.

If you find any product problems after receiving the item, such as damage or incorrect item quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sales service.