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) - Newegg.com
Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) DR x8 SODIMM 260-Pin Memory - CT2K16G4SFD8266 at Amazon.com