New! Specially designed Rock Planting Slab for bonsai. Designed and made by a top artificial rock manufacturer. Our rock slabs are made of a commercial grade GFRC (glass fiber reinforced concrete) mixture and features three built in drainage holes with a raised lip around the planting area and of course, all the look and feel of a real rock. 26"x16"x1" 3 drainage holes Raised lip around planting area 20 lbs Shipped via UPS Ground - $24.95