Genuine Dell DV-18S Latitude E4300 E4310 Series Laptop CD/DVD-ROM Super Slim SATA Optical Drive W520P 0W520P ID-0W520P.Model Number: DV-18SDell Part Number: W520P 0W520P ID-0W520PCompatible Part Numbers: DV-18S-ADL 1977217A-DLCompatible Models: Dell Latitude E4300 E4310 Series