I may be the last guy that is just now finding this palmer material, but just in case......
They make this stuff in 3 sizes: Small (1/2"), medium (3/4") and large (1 1/4"). The small and medium come attached to what appears to be a single piece of thread. When installing the smaller stuff, it wants to role...
The large, for lack of better words, is "double banded" and WAY easier to work with, IMHO.
From now on, I will just purchase the large and cut it to shorter lengths, as needed.