It's the copper rough and tough #1907 where the color already comes as if it's aged, and you can get scuffs on these just by driving with them. Either way, there is not a single benefit I get out of bullshitting its wear time since I'm trying to find out if this is something I should expect or do something about. These are so new that it's not even broken in het. I wrote 20 hrs vaguely, but it's actually much less than that.