Cultilene Cultiwool Wide Slab, 36" x 6" - Pack of 16X fibre slabs are unique for their optimum water distribution and excellent EC control, not only within one slab but also between slabs. This creates a root environment with outstanding control and with far better and much more even growth and root distribution. Slabs are 36", long and are available in several different widths. Cultiwool slab is a stone wool slab that is made with the X fibre technology. Instead of the usual horizontal or verticle