Speedy Inks - Compatible Kyocera Mita Black TK-6307 Laser Toner Cartridge For use in: TASKalfa 3500i, TASKalfa 4500i, & TASKalfa 5500i Color: Black | Page Yield: 35,000 Shelf Life: 24-36 Months The use of aftermarket replacement cartridges and supplies does not void your printer's warranty