This is really a safe, and just milled into form by CNC machine, and made in Germany, not China tr...
Made for PI3B+, I just received my kit and put it together, no fan needed because all the heat is transfered into the aluminium shell. The milling is perfect, transfer paste is included. In my tests I stay under 50° and you feel the heat on the case. Little expensive, costing the same price as the PI and for the moment I found it just on german Amazon.
https://www.amazon.de/gp/product/B01JBAGQNE/ref=ppx_yo_dt_b_asin_title_o01__o00_s00?ie=UTF8&psc=1
