Review on 🖨️ Hotcolor 8500a Printhead: Replacing HP 940 Printhead C4900A C4901A for Officejet Pro 8000 8500 (Black/Yellow Cyan/Magenta) by Will Kern

I plugged them in, I had them as a backup, when I put them in the printer it said something was wrong and you need to reinstall them. When they were on all settings were running, when I checked the status of the print head one of them said it was not good. Cleaning etc. No luck, a head says it's in the middle. Don't waste your money, try another brand.