The SureRoots 38-Cavity Deep Plug Tray is an ideal propagation tray for plants that require deep-rooted seedlings for successful transplanting. Heavy gauge provides durability in rigorous handling stresses both during seedling development and deployment int he field. V-shaped root guide ribs prevent root wrapping. It is made from 100 percent reclaimed resins and 100 percent recyclable after use.from T.O. Plastics, Inc.