VERY light duty
The bags that I got do not at all seem to be 3 mil thick.  In fact they are thinner than 2 mil bags.  The seal portion is also smaller and less heavy duty than most small bags. Overall they are not horrible quality but they are definitely less durable than I thought I was ordering.  There is no brand name on the outer  bag they came in which kind of makes me wonder if I got a knock off.
Rating: 2 stars