Exclusive High Quality Designer Aluminum Housing Case for Raspberry Pi + PLUS and Pi Model B 2 (the latest version 2015) (Black) (Personal Computers) 5
the Raspi housing is super processed and provides exactly what you would expect from a metal housing for the Raspi: protection against unfair environment. We use the Raspi in the housing on a robot system. There can sometimes be abrupt movements and sometimes even lead to a slight Battered packaging. Confidence in a solid aluminum housing is significantly higher than that in the usual plastic casing in this application.
