OWC 4GB PC12800 DDR3L 1600MHz SO-DIMM Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S4GB) at Amazon.com
DRR3 Memory Ram, Large Capacity PC12800 Memory Ram, 240Pin DDR3 2GB 1600MHz Memory Ram,Durable Portable for Notebook Desktop Laptop Computer Memory Card at Amazon.com
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
DRR3 Memory Ram, Large Capacity PC12800 Memory Ram, 240Pin DDR3 2GB 1600MHz Memory Ram,Durable Portable for Notebook Desktop Laptop Computer Memory Card at Amazon.com