Hey Matt,
Thanks for the reply. My apologies if I'm being a pain in the butt, just trying to understand the materials and process.
Please see the image below, to be more specific, what I was referring to is the internal dimensions of the supports for the cards, highlighted with the orange bars.
The physical cards themselves, left versus the right are the same.
As you can see there are differences between the two slabs themselves.
Out of the 50 cards or so I've had graded so far the left card's holder is the only one with different dimensions internally. The external dimensions appear to all be the same.
This is why I was asking about the penny sleeve being included.