Feature: 1. Function Test: Only printer printheads that have passed 100% functionality testing are shipped. Therefore, our printheads' functionality can be trusted. 2. Stable Performance: With stable printing performance, our printheads are highly reliable and secure. An ideal accessory to replace your broken products. 3. Durable ABS Material: Our printheads are made of strictly selected ABS material with fine machining. It is lightweight, rustproof, colorfast, and durable. 4. Easy Installation: No complicated assembly required. Just remove the old printer head and install the new one. Be sure to disconnect the power before installation. 5. Wide Compatibility: Our print head replacement is designed for R1390, L1800, R390, R270, R1430, and 1400 printers. Please confirm your printer model before purchasing. Specification: Item Type: Print Head Material: ABS Weight: Approx. 100g / 3.53oz Application: For R1390, L1800, R390, R270, R1430, 1400 Package List: 1 x Print Head Note: 1. The product is and may contain some protective fluid used to preserve the accessories. This is normal. 2. Solution for compatibility issues: Reset the printer by following these steps. Turn on the printer if it is not already on. Wait until the printer comes to a complete stop. Disconnect the power cord from the back of the printer and unplug it from the wall outlet. Wait at least 60 seconds. Plug the power cord back into the wall outlet, then reconnect it to the printer. Turn on the printer if it does not turn on automatically. Allow time for the printer to warm up. The indicator light may flash and the print head carriage may move. Wait until the printer is fully warmed up and stationary before use. If the issue persists, ensure the ink cartridge and ink are properly installed.