Apple Memory Module 16GB DDR4 2400MHz SO-DIMM (2x8GB) - Apple
A-Tech 64GB (4x16GB) RAM for Apple iMac 2017 27 inch Retina 5K | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
Mémoire RAM 8 Go DDR4 SODIMM 2400Mhz PC4-19200 pour iMac 2017/2019 - Mémoire RAM - Macway
A-Tech 8GB RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 1.2V 260-Pin SO-DIMM Memory Upgrade Module at Amazon.com
16GB DDR4 2400MHz PC4-19200 SO-DIMM RAM Memory Upgrade for 2017 iMac 27 inch with 5K Retina Display (PARTS-QUICK) - Walmart.com
Apple iMac Pro 27-inch (5K) 3.2 GHZ 8-Core Xeon (Intro 2017) Desktop 1 TB Flash HD & 64GB DDR4 RAM-Dual Boot Mac OS/Win 10 Pro (Certified, 1 Yr Warranty) - Walmart.com
A-Tech 32GB (2x16GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
8GB DDR4 2133 MHz PC4-17000 SODIMM Mac Memory RAM for APPLE iMac Mid 2017 A1418 | eBay