Apple Computer , iMac 21.5-inch 3.06/3.33 GHz Core 2 Duo (E7600, E8600), iMac 21.5 inch 3.2/3.6 GHz Core i3 (i3-540), iMac 21.5 inch 3.6 GHz Core i5 (i5-680),
Order Number, MB950LL/A, MC508LL/A, MC509LL/A,
Model Number, A1311,
Part Name, Mechanism Cover,
Manufacture Part Number, N/A,
EMC Number, EMC 2308, EMC 2389,
EEE Code, N/A,
Compatible Apple Computer, iMac (21.5-inch, Late 2009), iMac (21.5-inch, Mid 2010), ,
Order you product here:
922-9131 Mechanism Cover for iMac 21.5 inch Late 2009-Mid 2010 A1311 MB950LL/A, MC508LL/A, MC509LL/A,
922-9131
source
http://blogs.applepartsellers.com/922-9131-mechanism-cover-for-imac-21-5-inch-late-2009-mid-2010-a1311-mb950ll-a-mc508ll-a-mc509ll-a.html