The UNI-SLAB combines all the benefits of our traditional slabs with the versatility of a block. With a size of 9.5"L x 8"W x 4"H, the UNI-SLAB has great stability for any size plant. The UNI-SLAB is completely wrapped thus keeping all the roots of your plant safely contained within the slab, protected from light and outside contaminants. Yet it is small enough to be maneuverable, allowing your plants to be spaced as the plant canopy requires. Due to its height of 4", the UNI-SLAB is suitable for both top drip and flood systems.