Micron Original 16GB (8GBx2) DDR3L 1600MHz (PC3L-12800) SODIMM 204-Pin Memory - MT16KTF1G64HZ-1G6E1 at Amazon.com
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com