This is a smal tower to house 2 Mac Mini M4 and external SSD drives and USB Hub, using two 120 mm computer fans to cool the Macs.

I use this fan: https://www.amazon.com/ELUTENG-Cooling-Adjustable-Heatsink-Playstation/dp/B0B751T5M5/ref=sr_1_3?crid=1ICU28MI1EC7H&dib=eyJ2IjoiMSJ9.MFAUq379wlkrNUtjSgjmePuq-ItcvdAXbejyAhByDDhHvswMzpBccpv5939U0ct7WmZCKvNqYeWpYoHdOJWrrNQiAMfMC7gVFvAQgcECuclW-Rx1D37yhoYyW8Qv_FL537NKyvTKQGYuhF5js_uwiPrI4tgaqMwgib1sAwqvXoBaXeQQkQeW22ibxzTYjH3P7CJRHGSlPSMh-zqgqWtYnQhV9czVS2xXEdxuPrnjYm0.6-_Sv0rszJEIsx6WlSDHAbbal5FrlL8W6al1wZNuE6Y&dib_tag=se&keywords=eluelueluteng+dual+usb+computer+cooling+fan&qid=1737849233&sprefix=elueluteng+dual+usb+computer+cooling+fan%2Caps%2C160&sr=8-3