Good after-sales service:We have a good after-sales service. After you receive the product, you can communicate directly with any questions. We will give you a satisfactory reply as soon as possible. High Performance:950 Printer Head Tests are carried out before leaving the factory to ensure the performance of each set of accessories. 100% manual manual assembly line machine testing ensures the high-performance output of the product. Therefore, when you receive the product, there may be some ink, which is also normal,does not affect the printer's work. Hope you can understand. Easy installation:The kit contains 1 print head ?Without any accessories, without disassembly, it can be installed and used without harming the original machine. Note: Be careful when installing the sprinkler, be sure to cut off the power before putting it away. Premium Quality:Printing Print Head Printhead products are made of high-quality materials, safe and durable, and have a long service life. Note: It is recommended to use high-quality photo ink to extend the life of the piezoelectric nozzle. Compatible Models:The Print Head Replacement Kit Compatible with HP Officejet Pro 8100 8600 8620 8610 8650 251DW 276DW HP 950 951 950xl 951xl Printer.