Turf-Slab lengthens the life of areas prone to soil or turf erosion. Designed to complement a granular or natural turf fill, these 80mm (3.15?) thick stones provide stability for pond linings, vehicular access roads, event parking areas and environmentally sensitive locations. In natural color, Turf-Slab can also be mechanically installed, reducing both time and labor costs for your landscape project. Smooth finish. SPECIAL ORDER ONLY. Minimum quantities apply.