Humanscale CPU600 Adjustable Under-desk CPU Holder Black/Silver Mounts under the desk,Rotates a full 360 degrees for complete access to cables and portsSlides smoothly on nylon glides in 16 in. track Slides smoothly on nylon glides in 16 track, Adjusts to fit CPUs 3.6 to 9 wide by 12 to 20 high and up to 50lb Adjustable mounting plate ensures that the CPU will be centered and balanced Proprietary Quick Lock offers quick and easy installation Adjustable mounting plate ensures that the CPU will be centered and balanced Made predominantly of aluminum, with steel and polypropylene