Since it's an Italian product, most likely some kind of 00 flour is used. You can have a look here for some tips & videos, it's in Italian but google translate works reasonably well (right click on the page in google chrome):
https://laconfraternitadellapizza.forumfree.it/?t=71679964They say to use a medium strength flour for the 6h TA version and a stronger (W 300) for the 24h TC/TA version.
I linked this for you already in another thread, but just to make this one a bit more complete. The first part shows how to extend the discs without using a roller, notice that he leaves a bulge in the middle: