[quote name='apa' timestamp='1357982915' post='1931228']
Roto Jazz 77 Flats have a bright red silk at the tail end but dont think they have them at the ball. I cant see, its a through body!
A
[/quote]
Rotos do have red silk at both ends, and TIs do as well. (Not helpful I know!) Now, call me geeky, but I believe that the Rotosounds taper under the silk and the ball end, whereas the TIs don't and are hence thicker at the ball.
Edit: I need to get out more