Slab Type
Indicates the type of slab that a block this property is applied to represents.
Slabs are different from a lot of other blocks, in that two of them can be placed in the same block space. However, for uniformity, this is all an illusion, and this property is used to differentiate "half slabs", those that occupy half of a block from "full slabs", those that occupy a full block, when two slabs are placed in the same block.