Twelve South BackPack for iMac | Storage Shelf for iMac and Apple Displays - 1 Display(s) Supported - 27in Screen Support - 3.50 lb Load Capacity - 1

Not compatible with iMac M1. Compatible with iMac (21 and 27-inch models), iMac Pro, Apple Thunderbolt Display and Apple Cinema Display (21 and 27-inch) Adds a space-saving shelf that mounts to the back or front of your iMac or Apple Display. (Not compatible with iMac M1) Holds up to 3.5 pounds of hard drives, peripherals - even a MacBook Integrated cable rails allow for handy cord and cable management with integrated vertical pegs to supported hard drives "Helps create an organized workspace by elevating hard drives and other peripherals off your desk