L19C9720A: HP LJ 4600 BLACK TONER (641A) 9K, 9000 pages

    L19C9721A: HP LJ 4600/4650 CYAN TONER (641A) 8K, 8000 pages

    L19C9722A: HP LJ 4600/4650 YELLOW (641A) 8K, 8000 pages

    L19C9723A: HP LJ 4600/4650 MAGENTA (641A) 8K, 8000 pages