Here is a USB-C hub for iMac that lets you get more out of your computer. The Satechi Type-C Aluminum Monitor Stand Hub has USB 3.0 ports, USB-C data port, micro/SD card slots, and audio jack. It has a sleek design that perfectly matches your iMac.
This monitor stand hub raises your iMac to a more comfortable viewing height. It should work with all iMac models. you can get yours for $89.99.[where to get it]