LG/HL  GA11N 12.7mm SATA slot load for 661-5172 iMac 21.5" DVD±RW Burner Drive A1311.

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It is an Original HL GA11N 12.7mm Slot-in 8X DL DVD RW Burner Writer SATA Laptop Drive for Apple Mac iMac SATA Interface, 12.7 mm High, Slot-in-Loading Dimensions:128.0(W)mmx12.7(H)mmx129.0(D)mm Buffer Size: 2 MB Brand New,Never used. Compatibility: all use 12.7mm(Height) Slot Load SATA Drive Write Speed: DVD-RAM :5X DVD+R :8X DVD+R DL :4X DVD-R DL :4X DVD+RW :8X DVD-R :8X DVD-RW :6X CD-R :24X CD-RW :24X Read Speed: DVD-ROM/DL: 8X CD-R:24X CD-RW: 24X CD-ROM: 24X Package Included: 1pcs NEW HL GA11N DVD RW Burner SATA Drive

• Readable Format(s): CD-R, CD-ROM, CD-RW, DVD+R, DVD+R Dual Layer, DVD+RW, DVD+RW Dual Layer, DVD-R, DVD-R Dual Layer, DVD-RAM, DVD-ROM, DVD-RW, DVD-RW Dual Layer
• Writable Format(s): CD-R, CD-RW, DVD+R, DVD+R Dual Layer, DVD+RW, DVD+RW Dual Layer, DVD-R, DVD-R Dual Layer, DVD-RAM, DVD-RW, DVD-RW Dual Layer, CD-ROM, DVD-ROM
• Interface: SATA, Slot Load 12.7mm