This is a Compatible Brother TN580 (TN-580) High Yield Black Laser Toner Cartridge guaranteed to perform with Brother Laser Printers. It replaces the original Brother TN580 Laser Toner Cartridge. Replaces the low yield Brother TN550 (TN-550) Laser Toner. The compatible replacement TN580 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 TN-580 and offer high-quality printing results. Manufactured brand new, containing up to 100% new components, they are an economical alternative to expensive OEM TN580 Brother Laser Toner Cartridges and supplies, and offer big savings over brand-name TN-580 Laser Toner Cartridges and supplies. The use of compatible replacement Laser Toner Cartridges and supplies does not void Printer Warranty. Our Compatible TN580 Laser Toner Cartridge is a replacement for Brother TN580 / TN-580 Toner Cartridge.We offer a 100% Quality Satisfaction Guarantee on our Compatible TN580 Laser Toner Cartridges and supplies.