This remanufactured drum unit replaces the original Toshiba T4710U black toner cartridge and guaranteed to perform with your Toshiba e-STUDIO 477S, 527S laser printer. Our remanufacturing facility specially engineered this drum unit to match the quality, reliability and yield of expensive OEM (Original Equipment Manufacturer) toner cartridges. Purchasing this remanufactured toner cartridge is a great way to save money. Using this remanufactured Toshiba T4710U black toner cartridge will not void your printer’s warranty according to Magnuson-Moss Warranty Act of 1975. For your 100% satisfaction, we offer 3 year money back guarantee and free shipping on all orders $35+ within continental USA.