When I collected the package from FedEx, I expected the modules to come in an Air Box, due to the size of the box. But I was surprised to the modules just protected by bubble-wrapped plastic covers.
In the box
We asked Mushkin about this and they replied that they only sent the modules in this manner because they happen to run out of Air Boxes. But they assured us that their supply of Air Boxes will be replenished soon.
These dual-channel modules came in separate covers. Not particularly usual for modules pre-tested for dual-channel use, but we should let their performance tell the tale, shouldn't we?
Like many other manufacturers, the covers were not sealed, so it's easy to inspect the modules if you wish to do so.
There's also a small cut-out instruction sheet in each cover.