Stefan Mileschin

The even more cost-effective version of the Armor series does include the same 2TB drive model as the A85B, so the performance is basically the same, but the outside shell is now made of rubberized plastic instead of aluminum and this can be also noted by the lighter drive (277g vs 298g). The Armor A65B does max out at only 2TB (unlike A85B which can go up to 5TB), but includes the same MIL-STD 810G Method 516.6 Procedure IV protection standard as its more expensive brother.

http://www.madshrimps.be/articles/article/1001429/