The Brother LC 121BK ink cartridge is a high-quality printing consumable designed to meet the needs of both home and office environments. With a duty cycle of up to 300 pages, based on ISO/IEC 24711 standards, this ink cartridge offers a reliable solution for your printing requirements. Its compatibility with ink-jet technology ensures that it works seamlessly with your Brother printer, delivering crisp and vivid prints every time. Whether you're printing documents, reports, or photos, the Brother LC 121BK ink cartridge provides consistent and reliable performance, making it a valuable addition to your printing supplies.