And I'm sure they have a standardized way to determine width (at least you'd think they would). You know, at a given temperature under standard conditions. Ya, it'll change in the field, but they have to tell you something. If there were just 9, 10, 11mm ropes that would significantly limit the number of available ropes. I don't think they should stop manufacturing 9.1 ropes just because it might not always, 100% of the time be 9.1mm exactly. I think asking that might be a little anal retentive.