Amazon.com: Satechi Aluminum Type-C Clamp Hub Pro with USB-C Data Port, USB-A 3.0 Data, Micro/SD Card Reader - Compatible with 2020/2019/2017 iMac & iMac Pro, Does Not Fit 2021 iMac (Silver) :
Amazon.com: Apple iMac MNE02LL/A 21.5 Inch, 3.4GHz Intel Core i5, 8GB RAM, 1TB Fusion Drive, Silver (Renewed),macOS High Sierra : Electronics
Amazon.com: Mid 2020 Apple iMac with 3.1 GHz Core i5 (27 inch Retina 5K, 8GB RAM, 256GB SSD) (Renewed) : Electronics
Amazon.com: Apple iMac 27" with Retina 5K Display, 3.3Ghz 6-Core Intel i5, 8GB RAM, 512GB SSD, AMD Radeon Pro 5300 4GB, Mid 2020 : Electronics
Amazon.com: Satechi USB C Slim Dock for 24” iMac with Tool-Free Enclosure for M.2 PCIe NVMe and SATA SSDs– USB C Data Port, USB A, 2 USB 2.0, Micro/SD Card Reader (Silver) :