The Twin Pack Brother TN-2510XL High Capacity Black Toner Cartridge is a compatible laser printer accessory designed for use with Brother printers, such as the DCP-L2620DW. This unit includes two high-capacity black toner cartridges with a duty cycle of approximately 3,000 pages at 5% average coverage. The cartridges are suitable for various Brother printer models like the HL-L2400DW, DCP-L2627DW, and MFC-L2835DW, ensuring high-quality printing performance and longevity. Ideal for those looking to replace or upgrade their printer supplies with reliable and efficient toner cartridges.