looks like they are a new set of kits like the Stug III F & Pz IV D.
with the wheels & rubber tracks all in one.
The second one listed as a Pz IV H is just the same title accidentally carried over.
but meant to say Stug III C/D I'm guessing as the pic is different to the Stug III B listing.
The Correct Pz IV H listing better have Zimmerit as the pic is showing a 12SS, 6th co. Pz IV H
which all had zimmerit, IF they have Zimmerit I would be interested, other wise there would be no point.
PS looks like they fixed the Stug III C/D calling it a Pz IV H error since
& added a Pz IV F to the range.
The !/35 scale kit of the Pz IV H has zimmerit & uses the same Box Artwork