CD reduction neck stats

So, does anyone has a link and/or real and clear info about some cooldown reduction neck stats?



I'm lf some infos about:



a) tezza neck (the normal one) ~ real %



b) istina neck (normal) ~



c) oly warrior neck ~ real % (I think it's comparable with tezza normal, but dunno)



Also, what types of skills (magic/phy) they affects.



Ty.