In my supply a shell was broken. This should keep in mind buyers, since a conversion can take place completely and probably only in the next delivery can are defective envelopes. The packaging (the manufacturer) is bad, because the packaging can be easily pressed. I suspect that either the shells were already defective already upon delivery to Amazon or be crushed by the staff when packing (accidentally). As I said, not Amazon's fault.
On my next purchase I'll order other cases that have a harder outer packaging.
