Provide protection against shocks/impacts to a 3.5in hard drive The removable end cap leaves the rest of the drive protected while it is in use, & protects the connectors when the drive is not in use Designed to be stackable, for ease of storage BENEFITS 3 This two piece silicone hard drive protector sleeve provides a layer of sturdy protection against potential shock/impact damage for your 3.5in hard drives. When enclosed with larger top portion of sleeve, they provide added stability & protection for 3.5 in. SATA hard drives while inserted in any Star Tech.com Hard Drive Docking stations (SATADOCKU2, SATADOCKU2E, SATADOCK22UE) & most third party HD docks. This stackable versatile hard drive sleeve also offers the flexibility to fit most uninstalled IDE & SATA/SAS 3.5in 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 our SATA Hard Drive docks & "bare drive" (trayless) hard drive enclosures, & for keeping unused drives safe while not in use. WhatÂ’s in the box 3.5in Hard Drive Protector Sleeve