Frame It All Composite Raised Garden Bed Kit, 4' by 4' by 11" 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 Composite boards are made from 38% post-consumer recycled plastic and 62% sustainable hardwood fibers