Apple Computer , iMac 21.5-inch 3.1 Ghz Core i3 (i3-2100), Order Number, MC978LL/A, Model Number, A1311, Model Year, Late 2011, Part Name, AirPort Card (Europe), Manufacture Part Number, AR5BXB92, 825-7360-A, Compatible Apple Order Number, MB950LL/A, MC413LL/A, MB952LL/A, MB953LL/A, MC508LL/A, MC509LL/A, MC510LL/A, MC511LL/A, Compatible Apple Model Number, A1311 , A1312, EMC Number, EMC 2496, EEE Code, N/A, Compatible Apple Computer, iMac (21.5-inch, Late 2009), iMac (21.5-inch, Mid 2010), iMac (27-inch, Late 2009), iMac (27-inch, Mid 2010), ,
Order you product here: b661-5423 Airport Card (Europe) for iMac 21.5 inch Late 2011 A1311 MC978LL/A, b661-5423
source http://info.applepartsellers.com/b661-5423-airport-card-europe-for-imac-21-5-inch-late-2011-a1311-mc978ll-a