Dray965, I have a cone of their cotton Corn Silk #20979 but not their Pro which is polyester. I find though they have the same name, they don't always match. My cone is brand new so think there is 5,000 yds on it.
I've even had some of their cottn spools ordered at different times not match each other so I try to order at least 3 spools of each color as I know I'm never use more than that at one time. If anything I can use a close matching thread in the bobbin.
Let me know if the cotton cone will help you.