Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :
16GB Kit 2 x 8GB DDR3 PC3-10600 1333Mhz DESKTOP MEMORY 240 PIN Non-ECC RAM CL 11 at Amazon.com
4GB DDR3 PC3-10600 1333MHz 240-pin DIMM - FREE & FAST UK Delivery | Mr Memory®