This is a compatible Brother TN850 high yield black laser toner cartridge guaranteed to perform with your Brother laser printer. It replaces the original Brother TN850 toner cartridge. Compatible replacement laser toner cartridges and supplies (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the original Brother TN850 cartridge and offer high-quality printing results. Manufactured 100% brand new, containing only new components, they are an economical alternative to high-cost Brother laser toner cartridges and supplies, and offer big savings over brand-name Brother laser toner cartridges. The use of compatible replacement laser toner cartridges and supplies does not void your printer's warranty.