Speedy Inks Compatible Toner Cartridge Replacement for Dell 331-7377 | T9FKK Series 33/34 Extra High-Yield (Black) Page Yield 750 Alternative part numbers for this cartridge are 331-7377, 331-7417, 331-7387, Series 34, Series 33, Series 33R, T9FKK, KNTYH, KVH6V, H8GCY, 2T2PT. For use in Dell V525w V725w printers 100% satisfaction guarantee! The use of aftermarket replacement cartridges and supplies does not void your printer's warranty