... Namely to protect a hard drive when storing, you can order without any problems in my estimation at least 5 stack together or even more in a suitable container. Against damage to the internal equipment when dropped hard drives have long been protected up to a height of about 130 cm (more than table height so), but this cover does not protect well against chamfers / damage, but of course against leaking liquids and it also prevents the cooling the hard drives, so never install a panel with such a shell somewhere or permanently operate. If you want more, go and buy an external enclosure or wrap the disk in styrofoam ...