OWC 16GB PC12800 DDR3 1600MHz SO-DIMM Memory Compatible with 2015 (Late) iMac 27" w/Retina 5K Models and Compatible PCs (OWC1600DDR3S16G) at Amazon .com
OWC 16.0GB (4 x 4GB) 1333MHz 204-Pin DDR3 SO-DIMM PC3-10600 CL9 Memory Compatible with iMac (OWC1333DDR3S16S) at Amazon.com
A-Tech 16GB (2 x 8GB) RAM for Toshiba Satellite C50D-A-133 | DDR3 1600MHz SODIMM PC3-12800 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
16GB (1x16GB) DDR3-1866MHz PC3-14900 2Rx8 SODIMM Laptop Memory by NEMIX RAM at Amazon.com
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
Amazon.com: Crucial RAM 16GB Kit (2x8GB) DDR3 1600 MHz CL11 Memory for Mac CT2K8G3S160BM : Everything Else