This high-quality replacement toner cartridge is compatible with Hewlett-Packard C3909A toner cartridge. It offers 600 x 600 dpi printing for high-contrast, rich detail, and sharp images. It's a great choice for high-volume users, with its rated 15,000-page yield. Just like Hewlett-Packard printers, HP accessories and supplies are manufactured to high standards and provide the highest quality. Designed for: HP LaserJet 5si, 5siMX-NX, 5si Mopier, or 8000 series laser printers. 3-Month Warranty Free Shipping