Anticover

Anticovers are Sub Blocks with a thickness equal to 7/8ths that of a normal block. They can be crafting by placing Covers, Panels, Triple Covers, Slabs, Cover Slabs, and Triple Panels of the same material into the crafting grid in such a way that their combined thickness is equal to that of an Anticover (7/8ths of a full block).

Crafting
Anticovers can be crafted using a large number of different combinations of other Sub Blocks. Any combination of the Sub Blocks below will work, provided they add up to 7/8, and all materials used are made of the same material.
 * Cover - 1/8
 * Panel - 2/8
 * Triple Cover - 3/8
 * Slab - 4/8
 * Cover Slab - 5/8
 * Triple Panel - 6/8

Usages
Combining an Anticover and a Cover of the same material will create a normal block of that material.