Apple Computer , iMac 21.5-inch 2.5/2.7 GHz Core i5 (i5-2400S, i5-2500S), iMac 21.5-inch 2.8 GHz Core i7 (i7-2600S), iMac 27-inch 2.7 /3.1 GHz (i5-2500S, i5-2400), iMac 27-inch 3.4 GHz Core i7 (i7-2600), Order Number, MC309LL/A, MC812LL/A, MC813LL/A, MC814LL/A, MD063LL/A, BTO/CTO, Model Number, A1311, A1312, Part Name, Memory 4GB DDR3 1333MHz, Manufacture Part Number, N/A, EMC Number, EMC 2428, EMC 2429, EEE Code, N/A, Compatible Apple Computer, iMac (21.5-inch, Mid 2011), iMac (27-inch, Mid 2011), , Order you product here: 661-5939 Memory 4GB DDR3 for iMac 21.5/27 inch Mid 2011 A1311 A1312 MC309LL/A, MC812LL/A, MC813LL/A, MC814LL/A, MD063LL/A, BTO/CTO, 661-5939
source http://info.applepartsellers.com/661-5939-memory-4gb-ddr3-for-imac-21-5-27-inch-mid-2011-a1311-a1312-mc309ll-a-mc812ll-a-mc813ll-a-mc814ll-a-md063ll-a-bto-cto
