The HP 912XL Cyan (3YL81AE) is a high-yield ink cartridge made for HP OfficeJet and OfficeJet Pro printers. It contains pigment-based cyan ink, which delivers sharp, vibrant color and is more resistant to fading than dye-only inks. Because it’s the XL (high-yield) version, it has a larger capacity than standard cartridges, letting you print more pages before needing to replace it.