Feature: 1. Material: Premium 952 printhead housing is made of high quality ABS which is more abrasion resistant and has been tested many times to ensure printhead performance and keep your printer running smoothly. 2. Compatible Models: Compatible with for hp office Jet 7740 7730 7720 8210 8710 8730 8740 8216 8720 8725. 3. High Performance: Upgrade 952 print head chip, identify ink cartridges faster, print head ink jet smoothly, protect the printer, print clear, bright colors, make your life colorful. 4. Easy Installation: This printhead kit contains only one printhead, no other accessories or extra tools are needed, just push the printhead to complete the installation, saving time. 5. Note: Be careful when installing the nozzle, be sure to cut off the power before putting it away. Specification: Item Type: Print Head Product Material: ABS Applicable: For HP OfficeJet Pro 7740 7730 7720 8210 8710 8730 8740 8216 8720 8725. Package List: 1 x Print Head Note: Solution for incompatibility: Reset the printer, follow the steps below to reset the printing device. Turn on the printer (if not already turned on). Wait for the printer to come to a complete standstill before continuing. After turning on 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. Plug the power cord back into the wall outlet. NOTE: for HP recommends plugging the printer power cord directly into a wall outlet. Reconnect the power cord to the back of the printer. Turn on the printer (if not already turned on automatically). The printer may take a while to warm up. The printer lights might be blinking, and the carriage might move. Wait for the printer to warm up and come to a complete standstill before proceeding. If the above methods cannot solve the compatibility problem, you need to replace the original ink cartridge and ink.