Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2400MHz C16 Desktop Memory Kit - Black (CMK16GX4M2A2400C16), Vengeance LPX Black, 16GB (2 x 8GB) at Amazon .com
Amazon.com: Corsair Vengeance RGB Pro SL 32GB (2x16GB) DDR4 3200 (PC4-25600) C16 1.35V Desktop Memory - Black (CMH32GX4M2E3200C16) : Electronics
Corsair Vengeance LPX 32GB (2x16GB) 2133MHz C13 DDR4 DRAM Memory Kit – Black at Amazon.com
OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz SO-DIMMs Memory (OWC2666DDR4S32P) at Amazon.com
G.Skill Trident Z Royal Series [Silver] 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTRS at Amazon.com
Crucial Memory Bundle with 32GB (2 x 16GB) DDR4 2666MHz SODIMM Upgrade kit CT2K16G4SFD8266 Compatible with iMac Retina 5K 27-inch 2019 (iMac19,1) and Mac Mini 2018 (Macmini8,1) at Amazon.com