Features: 1Applicable: This black printhead replacement is applicable for HP933 932 6100 6600 6700 7110 7610 7510 printers. 2Stable Performance: This printer head has stable performance and high reliability which is suitable for replacing your broken printhead. 3Premium ABS Material: The print head replacement is made of premium ABS material with compact construction so that it has long service life. 4Functional Tested: The print head is 100 percents functional tested after completion of production and 100 percents functional tested before delivery. 5Features: This printer accessory head is rust proof colorfast light in weight that is perfect replacement for your broken printer head. Specification: Item Type: Print HeadMaterial: ABS Gross Weight: 232g/8.2ozApplicable Models: for HP933 932 6100 6600 6700 7110 7610 7510 Package List: 1 xPrintHead Note: 1. The product is a brand new product there may be some protective liquid it is to protect the accessories which is normal.2. 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: It is recommended that the printer power cord be plugged 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.3. If the above methods cannot solve the compatibility problem you need to replace the original ink cartridge and ink.