Flatwound ID!

[lmfreeman9]

Slightly more tension than average. Red silks on both ends.
Anybody have an idea as to what brand these may be?

 

[Zipper871]

Since you say it has higher than average tension I would say rotosound 77s. I remember them being really stiff and bright with red silks. If it were lower than average tension they would be TI Jazz flats.