For prints that are at the very highest level of quality, you need to make sure that you are using the best possible ink in your machine. HP knows its machines better than anybody else and it uses this expertise to create results that are clean and clear. The No. 309A Yellow High Yield Toner Cartridge is designed to provide the highest level of precision, guaranteeing that what you see on your screen is exactly what you achieve in your prints. All images are at the highest level of definition and text is kept easily legible.