Timetec Hynix IC 32GB KIT(2x16GB) Compatible for Apple 2017 iMac 27-inch w/Retina 5K Display, 2017 iMac 21.5-inch w/Retina 4K or Non-Retina Display DDR4 2400MHz PC4-19200 CL17 SODIMM(32GB KIT(2x16GB))