This two piece silicon hard drive protector sleeve provides a layer of sturdy protection against potential shock/impact damage for your 3.5 in hard drives. When enclosed with larger top portion of sleeve, they provide added stability & protection for 3.5 in. This stackable versatile hard drive sleeve also offers the flexibility to fit most uninstalled IDE & SATA/SAS 3.5 in HDDs, featuring a tip cover that's specifically designed to protect the hard drive interface ports during transportation or stacking, but can be removed for installation. The hard drive protector features a durable silicon design & a ventilation hole in the top portion for enhanced heat dissipation. The HDDSLEV35 is the perfect accessory to the SATA hard drive docks & "bare drive" (trayless) hard drive enclosures, & for keeping unused drives safe while not in use.