Speedy Inks - 2PK Compatible Replacement for HP 55X / HP 55X / CE255X HY Black Laser Toner Cartridge For use in: P3010, P3015, P3015D, P3015DN, P3015N, P3015X, MFP M525C, MFP M525DN, MFP M525F, M521DN MFP, MFP M521DW Page Yield: 12500* | Color: Black | *Average printer cartridge page yield in accordance with ISO 19752 Shelf Life: 36-48 Months The use of aftermarket replacement cartridges and supplies does not void your printer's warranty