Awesometoner Brother Compatible TN-580 TN580 Laser Toner Cartridge, 7,000 Pages, Black This new SUSA Premium Compatible Toner is designed to work with your Brother Laser Printers and is a replacement for Brother TN550 Toner Cartridge. SUSA's Compatible Toner Cartridges are engineered to meet the highest standards of quality and reliability. The yields of these cartridges either meet or exceed OEM standards and are conform to ISO 19752 Page Yield Testing. SupplyUSA's TN550 replacement toner cartridge is a high quality, cost-efficient alternative to the pricier Brother OEM. Shelf life: 12 months.