Features: Brand new and high quality. Experience smooth and stable printing with the printhead for HP91 series. Perfect replacement for your printer, ensuring natural colors and flawless nozzle performance. These printheads are made with polished nozzles and a jam-free design, guaranteeing a seamless printing process. Designed for professionals and individuals who value print quality, these printheads are ideal for graphic designers, photographers, and office users. Whether you're printing important documents, stunning photographs, or creative designs, these printheads deliver exceptional results every time. Upgrade your printing experience with these reliable and cost-effective printheads. Say goodbye to expensive replacements and enjoy high-quality prints without breaking the bank. Specifications: Product Model: Printhead For HP 91 Cartridge Color: Black Gray, Black Blue, Red Yellow, Red Blue (optional) Compatible Printer: For HP Designjet Z6100 42-inch (Q6651C) For HP Designjet Z6100 60-inch (Q6652C) For HP Designjet Z6100ps 42-inch (Q6653A) For HP Designjet Z6100ps 42-inch (Q6653C) For HP Designjet Z6100ps 60-inch (Q6654A) For HP Designjet Z6100ps 60-inch (Q6654C) Note: 1. When installing the nozzle, you must remove the air hole seal according to the instructions, but do not remove other seals at will, otherwise the ink will leak. 2. Each time a new nozzle is installed, the printhead should generally be cleaned 3-5 times (please wash the printhead at least once). 3. When a printhead is out of ink or not installed, even if there is ink in the other printheads, the photo machine will not work. 4. When the new nozzle is off, it is best not to remove it before changing the nozzle. 5. If you do not want to replace the nozzle, do not open the nozzle protective clip, otherwise the nozzle may no longer be used. 6. Do not reach into the printer or touch the nozzle when the printer is working; first check if the ink of a certain color in the ink cartridge has run out. Package includes: 1 x Printhead