661-5309 SDRAM, 4 GB, DDR3, 1066 MHz, SO-DIMM - 21.5 inch iMac Late 2009 - 27inch iMac Late 2009

Apple 661-5309 SDRAM, 4 GB, DDR3, 1066 MHz, SO-DIMM for 21.5 inch iMac Late 2009 - 27inch iMac Late 2009 - A1311, A1312 - Apple Memory 661-5309 - iMac (21.5-inch Late 2009), iMac (27-inch Late 2009) SDRAM, 4 GB, DDR3, 1066 MHz, SO-DIMM