I just got a relatively new CERT Japanese card and it’s in a very different more heavy / sturdy slab. I also just got a back some English cards from PSA and they are the normal older slabs. So has PSA introduced the new slabs only in their Japanese grading facility?
Huge difference in feel.
Mike
Yeah they’re about 20% heavier and have a good difference in clarity.
They’ve been using them since around 93xxxxxx in Japan, and I’ve been seeing them used more and more at PSA US in the last few weeks.
I stopped grading earlier this year. Have they really rolled out here in the US?? (the same case used in Jp)
Big if true.
I just got a 20 card submission back a couple weeks ago. All were in the old holders.
Mike
My last few submissions have had half half new/old holders. All Pokemon TCG so not oversized cards etc.
For reference here’s similar inquiry I made almost one year ago. 
The new JPN slabs feel wonderful! I will be reholdering many of my cards once the US starts switching to the newer slabs.
Some observation here. The new holders don’t work well with Plastx. Seems to leave some form of “lines” from the buffing.