This product is specifically designed for protecting and prolonging life of hard disk meanwhile it can reduce the mechanical noise working temperature etc.; It can match with 3.5 inch hard disk fix to 5.25 inch CD-ROM together compare with traditional way this way can avoid hard disk and chassis rigid contact; By this flexible way can reduce the noise which from hard disk and chassis working together during computer with high speed; Also can protect hard disk from external with high speed. Also can protect hard disk from external shocks. The main contracture is supported by 6 PCS high flexible and high strength silicone which is by hundreds time test for getting the best shock result; It provides more space for graphics developing insulation design can help electrical parts free from the static interference also can safe your important documents; Leaves 8cm for fitting fan for this design can reduce temper will be good cooling way for your computer