I would like to get a professional opinion on these Rockwool materials.
I am building full corner bass traps and also panels to fix on the wall.
The materials listed in the image below come in 50mm, 75mm & 100mm thickness and are 1200mm x 600mm in size.
I’d be grateful to anyone who could advise me on which of these materials is best for sound absorption.

http://i61.tinypic.com/fjnj9g.png
Many Thanks