Welcome to Vertical Slabs
Vertical Slabs is a mod that adds vertical slabs to Minecraft. They work in a similar way to vanilla stairs, connecting nicely to adjacent vertical slabs.
Each slab can be crafted with its vanilla normal slab counterpart, and can be crafted back into its vanilla normal slab counterpart as well. Additionally, you can use a stonecutter to craft vertical slabs from stone and similar materials, just as you can with the vanilla slabs.
(Note: Forge for 1.16.2 still isn't really ready. If any problems arise with different forge versions, please let me know. Current build is for forge1.16.2-33.0.22, might not work properly on other)