6" x 36" Cultilene Rockwool X-Fibre SlabsThe 36 slab has been designed to give an outstanding control over the plant growth by providing sufficient nutrient supply, maintaining the structure, retaining moisture to grow healthier roots, etc. The slabs distribute water to the plants adequately and allow better root distribution. The slab has been composed of basalt and volcanic rock. The rockwool slab has been composed utilizing the latest technology, which has spun the fibre in all