Frame It All RVG-REC16 Composite Wood Grain Timber Raised Garden, 4-Foot by 16-Foot by 11-Inch Timbers are made from recycled plastic and natural fibers. No toxic chemicals. Allows endless design options. You can add on or reconfigure your raised garden bed at any time using existing or additional Two Inch Series Frame It All components and accessories. Low maintenance - timbers will not rot, warp, splinter or fade. Made from recycled plastic Provides a deeper topsoil layer for poor soil conditions Adjusts easily to a variety of heights,shapes and sizes Improves drainage Quick and easy to assemble with little effort