I couldn't find the product weight on these anywhere on the page, and didn't think to search the web by the product ID until AFTER they arrived! It looks like these are 6 mil thick. They are thick enough for regular use, but they're not quite the solid nice feel that I was after for the front covers of all the school materials I bind. I'm sure I will find a use for these, and they are a great price, but be aware that they're not heavy duty in the thickness arena!
Rating: [4 of 5 Stars!]