KEMBONA Brand New Sealed PC DESKTOP LONG DIMM DDR3 4gb 1333 PC10600 Ram Memoria 1333D3N9/4G for all motherboard|4gb 1333|ddr3 4gb 1333ddr3 4gb - AliExpress
Amazon.com: 4GB PC10600 DDR3 1333MHz SO-DIMM Memory Compatible with 2011 MacBook Pro, Mid 2010/2011 21.5" & 27" iMac Models, 2011 Mac Mini (OWC1333DDR3S4GB) : Everything Else