VidaWool Rockwool HC Wide Slab with Hole, 3" (H) x 8" (W) x 36" (L) - Case of 12VidaWool Slabs VidaWool Slabs provide support for the remainder of the production cycle, giving your plants ample room to flourish. Plant spacing and placement are critical at this stage, when crowding can result in less than optimal crop development. VidaWool slabs make it simple to quickly and accurately transplant blocks and keep plants developing all the way to harvest while minimizing the time and effort spent setting up the room. Applications