Nexnova technical team focuses on the research and development of high-quality compatible consumables, and our professional team provides professional printing solutions. Chooses Nexnova for premium products and service. Warm Tips 1. For the better printing performance, please clean the printhead for 1-2 times after installing the new ink cartridges. 2. If the ink cartridges would not be recognized by your printer at the first time, please try to turn off the printer 30-40 second and then turn it on and re-install the cartridges again. 3. Please do not get out the old cartridge before replacing the new one to prevent the printhead from drying and clogging. 4. Please purchase the correct toner according to your printers Printing capacity of Nexnova compatible consumables-durable in use Large capacity Nexnova compatible ink / toner cartridge has large capacity, Nexnova products can print more pages in the same case of use. Both individuals and businesses can enjoy more printed pages. Such as schools, hospitals, banks, workplaces and family, etc Printing effect of Nexnova compatible consumables- be consistent out from within In order to ensure the high-quality printing effect of Nexnova products, all products are strictly manufactured before leaving the factory. Nexnova controls every link in the whole process from the purchase of raw material to the delivery of finished products. And every link is required to be precise to ensure that Nexnova can meet the strict quality standards. High quality raw material ensures high quality printing effect. Strict management ensures the stability of quality. Considering the convenience of preservation, all products are packed separately in a separate box. Good stability, fully compatibility with OEMs. There's no problem mixing them with OEMs. For HP Officejet Pro 8000-A809a/ A811a/A809n/8000 Wireless Officejet Pro 8500 –A909b/ A909a/A909n/A909g Officejet Pro 8500A-A910a/ A910g/A910n