Speedy Inks Compatible Ink Cartridge Replacement for HP 78A ( Black , 8-Pack ) For use in HP: LaserJet P1566, LaserJet Pro M1536dnf, & LaserJet Pro P1606dn Page yield: 2,100 | Pack of 8 Shelf Life: 24-36 Months Color: Black The use of aftermarket replacement cartridges and supplies does not void your printer's warranty