Speedy Inks - 2pk Compaitble for Samsung CLT-K407S Black Laser Toner Cartridge For use in Samsung: CLP-320, CLP-320N, CLP-321N, CLP-325, CLP-325W, CLP-326, CLX-3180, CLX-3185FW, CLX-3185N, & CLX-3186 Cost Per Page: 2.60 Cents Shelf Life: 24-36 Months Color: Black The use of aftermarket replacement cartridges and supplies does not void your printer's warranty