Cultiwool 6" Wide Slabs of Cultilene Rockwool - Case of 16Description Cultiwool 6" Wide Slab: Cultiwool's stone wool growing slabs are the final stage for cultivating crops. With various sizes and options for pre cut plant holes in the slabs, they offer a solution for nearly every type of growing system and required substrate volume per crop. Standard and Custom Cultiwool Slabs: Standard Cultiwool slabs feature a vertical fibre orientation. However, upon request, horizontal fibre orientations can also be