Genuine Dell HL Hitachi LG Data XN074, GSA-T21N IDE 8x DVD&plusmn;RW DVD-RW DVD+RW Slim Tray Load Internal Laptop Notebook Burner Optical Drive Compatible Part Numbers: GSA-T21N, XN074 **Guaranteed Dell Genuine** Manufacturer: Hitachi-LG Data Storage Part Number: XN074 Model: GSA-T21N **Ship within 24 hours except for holidays and weekends**