HP Drive
C4503-69401
is compatible in the following HP Models:
HP CD12 Internal CD-Writer series
HP CD12 INTERNAL CD-WRITER SERIES - C4502B
HP CD12 INTERNAL CD-WRITER SERIES - C4503B
HP CD12 INTERNAL CD-WRITER SERIES - C9638A
HP CD12 INTERNAL CD-WRITER SERIES - C9640A