Feature:1. Function Test: Only printer printheads that have passed 100 percent 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 light weight, rust proof, colorfast and durable.4. Easy Installation: No complicated assembly required. Just disassembly 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 1400 printer. Thus, please confirm your printer model before purchasing.Specification:Item Type: Print Head Material: ABS Weight: Approx. 100g or 3.53ozApplication: For R1390 L1800 R390 R270 R1430 1400.Package List:1 x Print Head Note:1.The product is brand new, there may be some protective fluid, which is to preserve the accessories and is a normal condition.2.Solution for incompatible method: Reset the printer Please follow the steps below to reset the printing device. Turn on the printer (if it is not already on). Allow the printer to come to a complete standstill before proceeding with the operation. After starting the printer, disconnect the power cord from the back of the printer. Unplug the power cord from the wall outlet. Wait at least 60 seconds. Insert the power cord plug back into the wall outlet. NOTE: It recommends that the printer power cord be plugged directly into the wall outlet. Reconnect the power cord to the back of the printer. Turn on the printer (if it is not already on automatically). The printer may need to warm up for a period of time. The printer light may flash and the pen holder may move. Wait until the printer has finished warming up and is completely stationary before proceeding. If the above does not solve the compatibility problem, you will need to replace the original ink cartridge and ink.