Speedy Inks Compatible Toner Cartridge Replacement for Okidata 42103001 (Black, 3-Pack) For use in Okidata: B4100, B4200, B4250, B4300, B4300n, B4350, & B4350n Page Yield: 2500 Color: Black | Shelf Life: 24-36 Months The use of aftermarket replacement cartridges and supplies does not void your printer's warranty