What sort of info are you looking for? What do you need to find out?
Here is their website with plenty of info:
https://velo-orange.com/collections/...fixed-hub-rear
From what I know of VO they make some decent stuff and I would have no reservations about using their hubs and have considered it several times. The claimed weight on those hubs isn't terrible mine are about 6 or so grams less (in claimed weight) and a polished finish ain't bad.