Apple Computer , iMac 21.5 inch 3.06 /3.2 GHz Core i3 (i3-540, i3-550), iMac 21.5 inch 3.6 GHz Core i5 (i5-680),
Order Number, MC508LL/A, MC509LL/A,
Model Number, A1311,
Model Year, Mid 2010,
Part Name, Optical Drive Data Cable,
Manufacture Part Number, N/A,
Compatible Apple Order Number, MC508LL/A , MC509LL/A,
Compatible Apple Model Number, A1311,
EMC Number, EMC 2389,
EEE Code, N/A,
Compatible Apple Computer, iMac (21.5-inch, Mid 2010), , , ,
Order you product here:
922-9370 Optical Drive Data Cable for iMac 21.5-inch Mid 2010 A1311 MC508LL/A, MC509LL/A,
922-9370
source
http://info.applepartsellers.com/922-9370-optical-drive-data-cable-for-imac-21-5-inch-mid-2010-a1311-mc508ll-a-mc509ll-a