Evercool Anti-Vibration Fan/ Hard Drive Mounting Kit UVS-01 Help to eliminate dB of PC noise by reducing the noise generated by fan vibrations. Tool free install. The special composition of rubber will absorb vibrations and reduce fan noise. It can help enhance the longevity of your hard drive. Suitable to closed chassis fans with thickness 25mm. Suitable to open chassis fans with thickness 4mm Rubber foot screws complies to 3.5" or 2.5" HDD.