OWC 16GB (4 x 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with iMac 21.5″ and 27″ (October/2009)

OWC 16GB (4 x 4GB) PC8500 DDR3 1066MHz SO-DIMMs MemoryCapacity 16GB (4 x 4GB)Compatible With iMac 21.5" and 27" (October/2009) Models, Compatible with PC desktops with Intel / AMD Process based PCs capable with the specifications listed above. Memory compl