Hi.
The new ring added, "Vocane Ring", does not display important information about the the effect "Reduces distance knocked back".
This goes against the decision Squareenix made, back to end 2013/start 2014, to quantify all pieces of gear with duration or amount affected. So, it does not make sense releasing an item with a so imprecise effect like Vocane Ring.
And being the nature of those rings, having an high cost to change, its not fair omitting such important information. 300,000 bayld is too expensive just to test an item to make conclusions if its worth to choose or not, also, more important, if it stacks with Repulse Mantle or not.