The Brother Genuine TN-310BK Black Toner Cartridge is a high-quality, laser print technology cartridge designed for use with various Brother printers. This vacuum-sealed cartridge is compatible with models such as the HL-4570CDW, MFC-9970CDW, and HL-4150CDN, providing crisp and professional-quality black prints. Made by Brother in China, this genuine toner cartridge ensures optimal performance and print quality for your printing needs.